13 best drill bit for large holes

Product description

10 power drill hole saws for professional use and DIY projects! Whether you’re a professional, an experienced handyman or you’re simply undertaking a home project, This two-piece hole saw set is exactly what you need to quickly create flawless holes effortlessly. This premium two-piece set includes 8 hole saws of different sizes and a cutting depth of 1 inch, a Mandrel, and Allen key. All these items come in a portable case for easy storage and organization. The diameters of the 8 metal hole saws are: 1" 1-1/4" 1-1/2" 1-3/4" 2" 2-1/8" 2-1/4" 2-1/2" The hole saws have high speed teeth and smooth cutting edges, so they are to create precise, super clean and truly flawless holes! These power drill hole saws will never fail you! Our hole saws are made with premium quality carbon steel and a nickel-plated coating, which is why they are so robust and durable. In fact, these woodworking hole saws are impact and wear resistant, and they can easily cut through wood, PCV, plastic and more. In other words, you can use these hole saws daily and their teeth will not wear out anytime Soon – this is an investment you won't regret! Upgrade your craft equipment today! Every true handyman needs a power drill hole saw kit for their woodworking and various home projects – so place an order and get yours today! And remember! This premium hole saw set is a great gift idea for any person who loves building things! Don't hold back Any longer! Scroll up and click “ADD to cart” now!

• Get the complete hole saw kit: Upgrade your woodwork, craft and power drill equipment with this complete hole saw bundle that includes 8 high carbon steel Hole saws, a mandrel, a hex key and case.
• The sizes of the hole saw set: the diameters of the 8 hole saw Cutters are 1", 1-1/4", 1-1/2", 1-3/4", 2", 2-1/8", 2-1/4", and 2-1/2", and they have a cutting depth of 1 inch.
• Flawless precision drilling: thanks to their high speed steel teeth and smooth cutting edges, These hole saws can cut through wood, puff and plastic with high precision and create super clean cuts.
• Built to last a lifetime: Made with premium quality carbon steel and a nickel-plated coating, These drill hole saws are impact and wear resistant, durable and robust.
• Keep everything organized: This 10-Piece power drill hole saw set comes in a practical, portable case that allows you to keep the drill hole saws organized and within easy reach when needed.
• 8 Hole Saws, 1 Mandrill

User questions & answers

Question:	What size is the shank? Will it fit in a regular size drill
Answer:	The Ryker Hardware Hole Saw Set includes a primary drill-bit shaft of 3/8". Most standard drills accommodate a 1/4", 3/8" or both drill-bit shanks. Best bet is to check your electric drill specifications for the shank/shaft size(s) it will support. Recent Purchaser
Question:	Can you stack or nest these to enlarge an existing hole or do you need an additional adapter
Answer:	Sadly the center of this tool is a drill bit, once the hold is cut the material the drill bit entered is taken away with the saw cut out leaving no place for the drill to Re center to enlarge the hole. I have free handed to make the hole larger using these saws but you are what keeps it centered not the center drill bit. It’s not easy but can be done. I would suggest instead using a power jigsaw since a hole is already there. Use a glass or round object like a coin to trace the hole you want to have then use the jigsaw to enlarge the hole. Hope that helps
Question:	Is everything that is needed included besides the drill or is there anything i have to buy extra
Answer:	Nothing extra to buy with this product. Drill bit is included and fits all the different hardware pieces.
Question:	Will the edges of the hole be smooth? Do they need to be sanded
Answer:	The smoothness of the hole generated depends on the type of material utilized (ex: plywood vs 2x4). Some sanding maybe required dependent on the desired finish.

Product description

Better Quality! Better Price! Better Service!



♦Durable and Useful

High quality heat-treated carbon steel for a longer using life; strong enough for cutting soft wood, thin PVC panel and thin plywood but not metal and hard wood.



♦Precision and Clean Holes

Sharp enhanced geometry teeth give a clean and fast cut of high precision through wood, PVC and plastic.



♦Oil to Avoid Natural Oxidation

Anti-rust oil on the surface to protect the hole saw from natural oxidation, which does not affect the use of the product.



Note:

♦Please wear protective goggles and gloves when using the hole saw kit.

♦Adapted Machines: Electric drill, Impact drill, Bench drill etc.

♦It's recommend using machines with Drilling speed: RPM≤1200, which can extend its service life.

♦Please let it to drill down naturally when using it. Do not force it to be pressed.



Contents:

4 x Hole Saws: 1-1/4" (32mm), 1-1/2" (38mm), 2" (51mm), 2-1/8" (54mm)

1 x Mandrel

• ▲【SAFETY AND DURABLE】: High quality heat-treated carbon steel of high strength and hardness, allows for a more aggressive cut; anti-rust oil on the surface to protect the hole saw from natural oxidation
• ▲【MULTI-PURPOSE】: Suitable for soft wood, thin PVC panel and thin plywood but not metal and hard wood, excellent tool for home DIY
• ▲【FAST AND CLEAN】: Smooth finish; sharp teeth reduces resistance during cutting and allows fast and clean cuts
• ▲【COMMON SIZE】: Covers hole saws of most common sizes in the market including 1-1/4-inch, 1-1/2-inch, 2-inch and 2-1/8-inch and a hole saw mandrel; cutting depth is 25 mm
• ▲【SATISFACTORY SERVICE】: If you have any question about our products, please feel free to contact us. We will always provide you with professional services until you are satisfied

User questions & answers

Question:	Will this cut through corian countertop
Answer:	Like a charm, as far as cutting goes. If the countertop is thicker than the depth of the hole saw, may have a problem finishing the cuts, but if the pilot hole goes all the way through the countertop, just have to be careful when you go in from the backside to finish the cut.
Question:	wil this cut through steel doors
Answer:	It doesn’t have carbide-tipped teeth, so might get through your mud room door into the garage, and might not. It would probably be ruined in the process. OTOH, works great on melamine-clad particle board shelves.
Question:	Will this cut aluminum
Answer:	Sure. Spin backwards so it cuts smoothly (thats how I do pvc)
Question:	Is there a 1 inch diameter that will fit this set
Answer:	The smallest diameter in this set is 1.25". Other sets go smaller but for wood, your best bet a set of economical spade bits. Amazon offers sets or individual sizes.

• Carbon steel construction with titanium coating for capability and durability. The flat paddle design features a sharp cutting edge, ensures the hole smooth clean.
• Self-centering spade tip for spot-on starts, and the bits evacuate the material as it cuts. Good choice of Hole Cutter.
• The sharp bit allows for accurate drilling to most types of wood, and also fiberglass, PVC (polyvinyl chloride) and soft metals such as aluminum.
• Set includes the following sizes 3/8", 1/2", 5/8", 3/4", 7/8", 1" .
• The paddle drill bits set includes six common sizes for versatility and fits the majority of brands currently on the market.

User questions & answers

Question:	will this work with an impact wrench
Answer:	No the bits need to spin only.
Question:	how long are the bits, including the part that goes into the drill chuck
Answer:	The bits are about 6inches long. As far as the chuck, that depends on the drill you are using. Its a 1/4in hex head.
Question:	Can these be used for Acrylic
Answer:	I've used 'spade' bits on plastic, lexan - polycarbonate, before as well as acrylic. Feed slowly and take your time.
Question:	My husband is a roofer and I am looking for a Christmas present could he possibly benefit from one of these items listed
Answer:	These bits would make a great gift. They're not longer available in stores and are probably the best set of paddle bits I've ever found.

Product features

Unique Titanium Coating

Titanium coating gives the drill bit better wear resistance and longer service life. Compared with ordinary drill bit, the life can be extended by 3-10 times. Titanium coating gives less friction to ensure smooth and clean holes.

Quick Change Hex Shank

1/4 inch Hex Shank fits into all power tools more easily and securely, especially for locking into quick change chuck. It's universal for the most drill driver tool of brands in the markets.

Widely Application

The sharp bit allows for accurate drilling to most types of wood, and also fiberglass, PVC (polyvinyl chloride）and soft metals such as aluminum.

Fast Drilling Design

Spur point ensures accurate positioning.

Groove for chip removal design ensures the hole smooth clean.

Cutting edge with double side cutting spurs of high quality for durable and quick drilling effortlessly.

• [THE MOST COMPLETE HOLE SAW KIT] Our hole saw set includes 12 most common sizes of saw blades:3/4" (19mm), 7/8" (22mm), 1-1/8" (28mm), 1-1/4" (32mm), 1-1/2" (38mm), 1-3/4" (44mm), 2-1/8" (54mm), 2-1/2" (64mm), 3" (76mm), 3-1/2" (89mm), 4" (102mm), 5" (127mm), 2 mandrels with nut, 1 Hex Key, 1 Install Plate. These tools are there to satisfy all your needs.
• [DURABLE AND SAFETY] Carbon Steel, Heat Treated. High strength and hardness, design for increased durability and outstanding cutting performance. Our hole saw features a reinforced shoulder for added strength and longer life.
• [EFFICIENT AND ACCURATE] High precision, smooth cutting edge. Super sharp saw teeth have been designed to cut faster, no material get stuck makes work faster and better finished. 
• [EASY TO SET UP]  All the tools you need for quick and easy saw changing. A hex key and install plate are included for tool installation. Mandrels with 20mm nuts that can be adjusted by hand or using a spanner when greater tightness is required.
• [PERFECT FOR MULTI-PURPOSE] Suitable for soft wood, plywood, oak, thin PVC board, plastic,drywall but not metal, great for tasks including cutting holes in desk surfaces, doors, furniture and cabinets. Serve for fitting handles and locks for furniture.

User questions & answers

Question:	Is there a warranty on this product
Answer:	YES.There are 12 months of worry-free protection, return refunds. If there is any dissatisfaction, please contact the seller, we will try our best to solve your problem.
Question:	The Dia of the saws are all over the place, but where can I find the thickness. Anyone know
Answer:	Goes to 2 to 3 in thick
Question:	How can I extend to drill thru a wall
Answer:	I used mine to drill through a 6" wall with 1' plywood. It can be done. A nail contact will destroy them.
Question:	Is everything that is needed included besides the drill or is there anything i have to buy extra
Answer:	All you need is a drill.... and something that needs a hole.

Product description

Features:

High Quality Material And Precise Cut:

Made of heat treated carbon steel material for added strength and longer life. Super sharp saw teeth have been designed to cut cleaner and preciser holes with smooth edges.



Multi-Purpose:

An array of 12 universal sizes of hole saw ranging from 3/4” to 6” in diameter, so you can choose the right size for your project.



Easy to set up:

All the tools you need for quick and easy saw changing. A hex key, an installation plate, two mandrels, two drill bits are included for tool installation.



Wide Use:

Ideal for softwood, plastic plate, plasterboard and thin PVC board, not suitable for hard metal, hard wood, density board, applicable to desk surfaces, doors and furniture.



Specifications:

Material: Carbon Steel

Item Weight: 3.42 pounds

Cutting Depth: 25mm

13 Sizes Blades: 3/4" (19mm), 7/8" (22mm), 1-1/8" (28mm), 1-1/4" (32mm), 1-1/2" (38mm), 1-3/4" (44mm), 2" (51mm), 2-1/2" (64mm), 3" (76mm), 3-1/2" (89mm), 4" (102mm), 5" (127mm), 6"(152mm)



Package Content:

13* Saw Blades

2* Mandrels

2* Drill Bits

1* Installation Plate

1* Hex Key

1* Package Box

• 【19PC ACCESSORIES】: 13 hole saws with the size of 3/4" (19mm), 7/8" (22mm), 1-1/8" (28mm), 1-1/4" (32mm), 1-1/2" (38mm), 1-3/4" (44mm), 2" (51mm), 2-1/2" (64mm), 3" (76mm), 3-1/2" (89mm), 4" (102mm), 5" (127mm), 6"(152mm), 2 mandrels, 2 drill bits, 1 hex key, 1 installation plate.
• 【HIGH-QUALITY AND PRECISE】: Made of premium heat treated carbon steel, rust-proof and wear-resistant, very easy to put together the set with the drill, ultra sharp serrations for high-performance, faster and cleaner cutting. The deepest cutting depth is 25 mm.
• 【MULTI-PURPOSE USE】: Suitable for soft wood, plywood, thin PVC board, plastic, plasterboard but not for metal, hard wood and density board, great for tasks of cutting multiple hole sizes from small to large in desk surfaces, doors and furniture.
• 【EASY ORGANIZATION】: HYCHIKA hole saw set comes with a a nice hard carry case to keep all saw blades and accessories organized and convenient to take.
• 【PACKAGE INCLUDES】: 13 x HYCHIKA Hole Saw Blades; 2×Mandrels; 2 x Drill Bits; 1×Hex Key; 1×Installation Plate; 1×Storage Case; 1 x User Manual.

User questions & answers

Question:	do these tools make great holes for 2' thick wood
Answer:	Doubtful. Especially if a hard wood. You’d have to cut from both sides for 2”. Better off with a good router bit and circle jig.
Question:	Can it be used with 1/4 drill
Answer:	Yes for the smaller sizes
Question:	What is the purpose of the installation plate
Answer:	The metal for the round saw blades is pretty thin and would easily deform if the blade got bound and put too much torque on the flat oval cutout. So the installation plate helps reinforce the connection between the blade and the mandrel.
Question:	Will this for ryobi tools
Answer:	Any drill with a 3/8" chuck will work, I used a Ryobi ONE+ and it worked fine cutting a 5" hole in 3/4" plywood.

• ✔ Satisfied Size - 6mm/0.23", 8mm/0.31", 10mm/0.39", 12mm/0.47", 14mm/0.55", 16mm/0.62", 18mm/0.7", 22mm/0.86", 26mm/1.02", 32mm/1.26"
• ✔ Ideal Application - This diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other.They are perfect for drill glass, tile bottles,blocks jars, fiberglass porcelain tile ceramic, slate Mable, granite light stone
• ✔ Super Material - These diamond drill bits made of high-speed steel that is durable and have a long sevice life,which are high quality and good performance that excellent for making clean and accurate hole.
• ✔ Sharp&Smooth Cut - Coated with high quality diamond, the diamond hole saw creates a high precision, smooth cut with no broken edges. Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably
• ✔ Note - When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn.Not for use on Concrete or for depths beyond about 1/2".

User questions & answers

Question:	Drill though iron sink
Answer:	Hi，out wet tile saw included one piece of Diamond blade .The Arbor Size is 5/8'',outer size is 7''.
Question:	Can these be used on sterling silver sheet
Answer:	Hi，our tile cutter is used for cutting marble and tiles.
Question:	Can you use this to cut a hole in a glass wine bottle
Answer:	There is a bottle of clear included with the kit which is supposed to be used to seal the color. Mix the colors to get as close a color match as possible and then seal it.
Question:	Does this set come with a case
Answer:	I do not think it would work

Product features

Super Material

These diamond drill bits made of high-speed steel that is durable and have a long sevice life,which are high quality and good performance that excellent for making clean and accurate hole.

Specifications

Size: 6mm/0.23", 8mm/0.31", 10mm/0.39", 12mm/0.47",

14mm/0.55", 16mm/0.62", 18mm/0.7", 22mm/0.86",

26mm/1.02", 32mm/1.26"

 

Note

When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn.Not for use on Concrete or for depths beyond about 1/2".

What Materials Can I Use Diamond Drill Bits On?

Diamond drill bits are perfect for drilling holes through hard materials such as these:

• Glass, sea glass, beach glass, fused glass
• Stone, gemstones, rock, pebbles
• Ceramic, porcelain, tiles, glazed pottery, plates
• Shell, antler, bone, fossil
• Very hard wood

Diamond Drill Bits - Why should I Choose?

• Small Diamond Drill Bits have a solid end and therefore a larger surface area so they last longer than the small diamond core drills, but may take longer to drill a hole. They are more robust and therefore ideal for very tough, dense pieces of sea glass, very hard stone, precious stone, gemstones, hard shell, bone and antler.

 

• If you're a regular user of diamond drill bits it is worth having a combination of both small diamond drill bits in your tool box as sometimes you don't know if you have a very tough material until you start drilling!

Operation Note

• As with all diamond drill bits you should use water as a lubricant and coolant.
• Being hollow, allows the water to flow up inside and around the inner core of these drill bits as you are drilling, helping to keep the drill bit cool and removing the debris.
• Start your hole diagonally, make a round trace and then hold drill straight.

Product description

Thank you for purchasing in our store! If need any help, please email us freely on Monday to Friday, we will find a best solution for you!



Hole Saw have wide slots placed low on each hole saw and multiple leverage points to make it easy to work plugs out with a screwdriver. As well as effectively removes sawdust and chips and helps prevent plugs from becoming stuck in each saw.



Specifications:

Material: Carbon steel

Cutting depth: 1" - 25 mm

Hole saw sizes: 3/4" - 19mm, 7/8"- 22mm, 1 1/8"-29mm, 1 1/4"- 32mm, 1 1/2"-38mm, 1 1/3"- 44mm, 2"- 51mm, 2 1/2"- 64mm.

Weight: 431g

Quantity: 10 pcs



Note:

1. When using, wear protective goggles and gloves.

2. Not suitable for hard material such as density board, aluminum, stone and computer tables.

3.After the use of a few anti-rust oil on the surface of the filter to avoid natural oxidation, can improve its service life.

4. Hole saw are suitable for wood, if you need hole saw set for metal please find a thicker hole saw set.

5. In order to prevent rusting of the drill bit, oil is required after production, and some products will be stained with oil on the surface, which will not affect the performance of the product. Please rest assured and use it normally.



6. Avoid storing in a humid environment, which may cause the product to rust.



Package Includes:

8x Carbon Steel Hole Saw

2x Center drill

1x Hex Key

1x Package Box

1x Pilot Drill

• High quality material: Hole Saw Set are made of high strength carbon steel, and nickel-plated with a diamond dust coating offers superior performance and cutting strength, sturdy and durable, for long-term application.
• 8 different sizes: Includes the following diameters, 3/4" - 19mm, 7/8"- 22mm, 1 1/8"-29mm, 1 1/4"- 32mm, 1 1/2"-38mm, 1 1/3"- 44mm, 2"- 51mm, 2 1/2"- 64mm. Covers most popular hole saw sizes on the market, Different sizes meet your different needs, cutting depth 25 mm. Includes Hex Key and 2 center drill, make the corresponding operation is convenient.
• Outstanding performance: The special gear design makes the hole more accurate, and high speed steel teeth for fast and clean cuts. High precision, smooth cutting edges, especially impact resistance, wear resistance! Suitable for normal wood, thin PVC board, plastic.
• Well organized: It has been well organized in a convenient plastic storage case helping you easy carry out for work. After use, easy to store together for the next time you use.
• 100% brand new quality: Locisne Hole Saw Set is guaranteed to be 100% brand new quality, if have any problems with our products or service, kindly please feel free to contact us.

User questions & answers

Question:	Will this work with plexiglass
Answer:	This is a very light duty hole saw, I broke 2 of them trying to make a hole in a 2 inch wooden desk.
Question:	Will this drill rhru a 2x
Answer:	yes
Question:	Is it easy to carry
Answer:	Yes, it is small, light and easy to carry. Good for part time hobbyists sawing holes through thin soft-wood or other similarly dense objects, but definitely not for daily use; pretty shallow too.
Question:	whats the size of the shank? I need 1/8 for a dremel
Answer:	Not for Dremel...

• 【Glass Drill Bit】These diamond drill bits are made of industrial grade carbon steel with nickel-plated coated body to resist corrosion. Fine workmanship and super wear-resistant, sharp
• 【High Quality Drill】Each hole is treated with smooth and accurate surface treatment,and the top oh the hole is thickened to achieve excellent cutting strength
• 【Tile Hole Saw 15 Sizes】 6/ 8/ 10/ 12/ 14/ 16/ 18/ 20/ 22/ 25/ 26/ 28/ 30/ 40/ 50 mm，to meet various demands
• 【Wide Usage】Used on Drill Glass,Wood,Tile Bottles,Blocks Jars, Ceramic,Slate Mable, Granite Light Stone, and other hard surfaces
• 【Attention】Please keep adding water when the diamond drill bits are working on the glass or ceramics.low drill pressure and increased use of water lubrication will extend drill bit life.

User questions & answers

Question:	Is there an available guide for this tool
Answer:	Not that I know of, I found cutting thru brick I had to take it slow. I just tipped the cutting tool slightly till I had started a slight half circle then was able to hold to start the full circle. I was very surprised that it did a nice job cutting thru the brick half at a time
Question:	Can this diamond drill bits be used for concrete
Answer:	Sorry, can't be used in concrete
Question:	Does this tool work with wood
Answer:	I would not use it for wood...it is designed for glass, acrylic marble etc...
Question:	Will these fit and work with a dremel
Answer:	I used a cordless drill. It would not fit my dremel. Also, I felt that I head better control cutting the stained glass with the cordless drill.

Product description

DEWALT DW1586 1-1/2-Inch by 6-Inch Spade Drill Bit

From the Manufacturer

DEWALT DW1586 1-1/2-Inch by 6-Inch Spade Drill Bit

• Heavy-duty shank provides maximum durability
• Cutting spurs provide optimum hole finish
• Hex shank prevents slipping and fits all 1/4" quick change systems
• Hang hole allows for bit storage & wire pulling

User questions & answers

Question:	Looking for a 1-3/4 spade wood bit
Answer:	Well, this is a 1½" spade bit, so use the search tab at the top.
Question:	Does this bit attach to other spade bits other than dewalt
Answer:	Fits all 1/4" quick change systems.
Question:	Has anybody used this in there impact tool? I use my impact to drill holes in wood and want to make sure this would hold up using it with an impact
Answer:	I have used mine with the DeWalt DCF 887 model and have had no problem drilling with a 3/4 paddle bit.
Question:	What does it mean 'for spade drill bits'? Can this be used just for a hex nut driver holder? Im assuming so, but just checking to be sure
Answer:	Yes, they are hex drive. spade refers to the tip.

• Cobalt high speed steel along with the titanium coating ensures extreme durability, will stay new and shiny for years to come.
• Different sized shanks ensure compatibility with 1/4, 3/8 and 1/2 in. chuck sizes.
• Non-walking drill tip provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. (the board must be smaller in thickness than the height of step drill bits).
• Please mark the spot that you are to drill for easier drilling and improved drill bits life.
• All the bits come in a well-organized case for easy transport and storage.

User questions & answers

Question:	How good is the quality
Answer:	This is a set of 5 drill bits. You can use either 3/8 or 1/2 drill with the drill bits included.
Question:	Is this for a 3/8 drill or
Answer:	You don't "need" any of these bits. Both, my...another family member and I purchased these as the touting of cobalt, titanium, and High Speed Steel bits made us both believe they were a steal of a steel deal. Boy we couldn't have been more wrong! Destroyed 1st use at slow speed off the speed chart and using tapping fluid to lubricate. These are absolute garbage. AGAIN THESE ARE ABSOLUTE GARBAGE BITS. I've got a free pocket knife from a gas station that drills better. Shavings from the first time we used these bits were put in the MassSpec at his showed NO cobalt at all present. For those that don't know a mass spectrometer gives you a breakdown of the molecules and elements present in a sample. Upon my complaining to the seller, I was told well.... "They're only cobalt colored and aren't intended for use on steel or hard metal alloys." You buy a cobalt %containing bits to handle the higher frictional heats encounters when cutting/drilling tougher steel alloys, stainless, or even just wanting your High Speed Steel bits to last longer. It's so your bit doesn't take damage and be destroyed or worse yet damage the piece you're drilling (especially when you're using tapping fluid too to lubricate the cutting edges reducing that friction and subsequent damaging heat) and M42 is the highest grade of cobalt bits I have & that I know of / have used. You buy titanium bits from M7 (high molybdenum for toughness) to M35 (HSS with a 5% titanium component) or the king of titanium bits and heat dissipation (HSS with 8% titanium) so your bits won't be damaged to the point they're unable to be used again. These high end bits you pay for ones made right. There are proper recipies the boundaries mix up molten of all the components from the iron and nickel of base steel, to adding molybdenum for toughness, cobalt for thermal resilience, titanium coatings to reduce friction, and many many more components in a bakery for steel. These bits are beyond poorly made and are NOT good moreless decent bits. So I'll reiterate fro my own and others experience, THESE ARE JUNK AND YOU DONT "NEED" THEM.....well unless you need to drill holes in pure Gallium at ambient temperatures above 30°C. And just a FYI I have 1/8" M42 aircraft legnth bits that'll drill through a 10" hardened steel block and a 1.0" M42 bit that could just about drill aluminum foil without tearing it. Size has nothing to do with quality. Small bits for small sheets and big bits for big sheets is a cop out answer to make the customer think they're the problem in how they're using the bits. The bits are crap and the Seller sends different answers to different people. They're garbage bits from cheap garbage metal (I hesitate to even call them true steel) see less
Question:	Are these bits titanium or cobalt? The product description shows both titanium & cobalt
Answer:	You don't "need" any of these bits. Both, my...another family member and I purchased these as the touting of cobalt, titanium, and High Speed Steel bits made us both believe they were a steal of a steel deal. Boy we couldn't have been more wrong! These are absolute garbage. AGAIN THESE ARE ABSOLUTE GARBAGE BITS. I've got a free pocket knife from a gas station that drills better. Shavings from the first time we used these bits were put in the MassSpec at his showed NO cobalt at all present. For those that don't know a mass spectrometer gives you a breakdown of the molecules and elements present in a sample. Upon my complaining to the seller, I was told well.... "They're only cobalt colored and aren't intended for use on steel or hard metal alloys." You buy a cobalt %containing bits to handle the higher frictional heats encounters when cutting/drilling tougher steel alloys, stainless, or even just wanting your High Speed Steel bits to last longer. It's so your bit doesn't take damage and be destroyed or worse yet damage the piece you're drilling (especially when you're using tapping fluid too to lubricate the cutting edges reducing that friction and subsequent damaging heat) and M42 is the highest grade of cobalt bits I have & that I know of / have used. You buy titanium bits from M7 (high molybdenum for toughness) to M35 (HSS with a 5% titanium component) or the king of titanium bits and heat dissipation (HSS with 8% titanium) so your bits won't be damaged to the point they're unable to be used again. These high end bits you pay for ones made right. There are proper recipies the boundaries mix up molten of all the components from the iron and nickel of base steel, to adding molybdenum for toughness, cobalt for thermal resilience, titanium coatings to reduce friction, and many many more components in a bakery for steel. These bits are beyond poorly made and are NOT good moreless decent bits. So I'll reiterate fro my own and others experience, THESE ARE JUNK AND YOU DONT "NEED" THEM.....well unless you need to drill holes in pure Gallium at ambient temperatures above 30°C. And just a FYI I have 1/8" M42 aircraft legnth bits that'll drill through a 10" hardened steel block and a 1.0" M42 bit that could just about drill aluminum foil without tearing it. Size has nothing to do with quality. Small bits for small sheets and big bits for big sheets is a cop out answer to make the customer think they're the problem in how they're using the bits. The bits are crap and the Seller sends different answers to different people. They're garbage bits from cheap garbage metal (I hesitate to even call them true steel)
Question:	Noob question, but why do I need five of these bits? It seems like you could get all the increments with one or two
Answer:	It will definitely cut aluminum...its I deal for porting a cylinder head...

Product features

Advantages of HSS Step Drill Bits

• ✨【Material】The hole saw is made of HHS BI-metal.Non-binding clean edge design.
• ✨【Dimension】Total Length : 96mm / 3.77" ;Shank Diameter : 10mm / 0.4";Cutting Dia: 75mm/2.95" ;Cutting Depth : 25mm / 1"
• ✨【Application】 This Hole Saw Drill Bit is designed for wood / plastic cutting.Suits for corn hole board drilling and other home projects.
• ✨【Sharp Teeth】The teeth is sharp and vibarition is less, which enable more stable operation and make the hole can be cut with quick speed and balance.
• ✨【Clearance Hole】The hole saw drill bit is equipped with chip removal holes, which largely improve the speed to clean chips.

User questions & answers

Question:	How close to 3" is the 75mm saw
Answer:	On a ruler, 75MM = 3 inches . On Rannb,s information 75MM =2.95 inches.
Question:	Is this used with a normal household drill
Answer:	Hi. Thanks for your interests to our product. Yes, this hole saw can be used with normal household drill. The shank diameter of the hole saw is 10mm/0.393".
Question:	Can the depth of the drill bit be adjusted? there is very little room behind the hole I need to make and don't want to hit what's behind
Answer:	Once the hole is half way through you can remove the center drill bit entirely.

• Diamond coating maximizes performance and retains a sharper cutting edge than traditional carbide or bimetal hole saws
• Side holes allow for easy slug removal after drilling
• Perfect set for cutting accurate holes in a wide variety of materials such as glass and ceramics
• Nickel plating on these bits maximizes your tool’s life with great resistance to corrosion
• 5pcs 12mm 1/2" Inch

User questions & answers

Question:	Should i use the drill bit hole saw or bosch gt600 1/2inch carbide tipped glass, ceramic and tile drill bit to make holes in plant pots
Answer:	depends on the pot, if it ceramic and glazed utse the bit hole saws, if not glazed use the gt600 just make sure you keep the bits wet and cool while drilling
Question:	How are the crafts in the "product show" made using this drill bit? The glass is cut circularly it appears? Also do you sell different sizes
Answer:	These are “hole saw” bits so they do cut a little glass “plug” out. I’m sure they come in other sizes.
Question:	Are they suitable for making holes in acrylic sheets? Thank you
Answer:	I have not tried using these bits on acrylics. These bits grind a hole through material and acrylic will soften and you will probably will not end up with a clean hole. You use these bits in a drill press not a hand drill because there is no pilot bit to keep the bit in place.
Question:	Will these work with Dremel tool
Answer:	No they won't, the Dremel does not have the right size collet.. I use my drill press with a custom jig I made to hold the bottles.. I hope this helps

Product features

The perfect glass drill bit!

Great for Home Projects

Smooth and Efficient Drilling

Diamond coating maximizes drilling performance and retains a sharp cutting edge after multiple applications.

Versatile Uses,Set includes commonly used sizes that is great for home and professional use all around the house. Great to use on multiple types of materials including glass, plastic, and ceramics

If you're a regular user of diamond drill bits it is worth having a combination of both small diamond drill bits in your tool box as sometimes you don't know if you have a very tough material until you start drilling!

Perfect set for cutting accurate holes in a wide variety of materials such as glass and ceramics

These diamond drill bits made of high-speed steel that is durable and have a long sevice life,which are high quality and good performance that excellent for making clean and accurate hole.

Please keep adding water when the diamond drill bits are working on the glass or ceramics.low drill pressure and increased use of water lubrication will extend drill bit life.

The perfect marble drill bit!

Nickel Plated for Extra Durability

Each bit is coated with an extra layer of nickel for protection against corrosion after multiple use.

When you using the diamond drill bits, please use lubrication (water),otherwise the diamond core drill will burn.Not for use on Concrete or for depths beyond about 1/2".(12MM)

Electroplated diamond coating will wear off if the tool gets too hot. Never let your drill bit run dry

1.You can build a mini water dam around the hole with plumbers putty.

2.You can choose to spray water on the drill bit.

3. Or you can use running water to cool the drill bit.

Diamond coating maximizes performance and retains a sharper cutting edge than traditional carbide or bimetal hole saws

Product description

Diamond Drill Bit Set, Drillpro 10 PCS Glass Hole Saw for Tiles Glass Ceramic Marble Bottles DIY,6mm -- 30mm



Diamond Drill Bits, are also know as Diamond Core Drill Bits, Diamond Hole Saws or Bonded Diamond Drill Bits. They are often called Glass Drill or Tile Drill, but they are much more versatile since they are used to drill glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, granite, light stone, and fiberglass.



Features:



- This is a brand new product

- This diamond bit core drilling removes a complete circle glass, tiles, marble, granite, ceramic or other material and only needs water for lubrication

- Can be used with a standard electric drill (not included)

- Easy to use, high quality, good performance, long life

- Excellent for making clean and accurate hole on glass, tile and marble

- Always use lubricant (water), otherwise the diamond core drill will burn

- Start the hole diagonally, make a round trace and then hold drill drittoSpecifica



Specifications:



Model: 10 Pcs 6mm -- 30mm



Size:

6mm / 12:23 ", 8mm / 0.31", 10mm / 0.39 "to 12mm / 0:47", 14mm / 0:55 ", 16mm / 0.62" 18mm / 0.7 ", 20mm / 0.78", 22mm / 0.86 ", 30mm / 1.17"



Note:



If you smell burning, back off! Either your speed is too high or the pressure you're applying is too much. You're drill bit should never be hot to the touch, not even warm.

- Slowest speed

- Coolant

- Minimum pressure



The general rule is the smaller the diameter of your drill bit, the faster drill speed you can use. The harder your material, the slower drill speed you should use.

Packaged included:

10pcs Diamond Coated Hole Saw Drill Bits

• SMALL RESISTANCE: Small incision resistance, opening speed is quickly, easy removal of chips and other advantages.Also help to open accurately. Large chip holes to ensure that when the punching smooth, punching accurate.
• DURABLE: Nickel-plated with a diamond dust coating offers superior performance and cutting strength.Extended service life.This diamond drill bits are high quality and good performance that excellent for making clean and accurate hole.
• IDEAL FOR: This diamond coated core drill bit removes a complete circle from glass, marble, tiles,granite, ceramic or other.Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably.
• TIP: Can be used with a standard electric drill (not included), Always use lubrication (water), otherwise the diamond core drill will burn. Warnings: Not for use on Concrete or for depths beyond about 1/2"; Water is required for lubrication when drilling.
• 10 SIZES: Total 10 different sizes (6mm,8mm,10mm,12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 30mm).Different sizes meet your different needs,help you in different places.

User questions & answers

Question:	will these cut through plastic and gourds? Thank you in advance
Answer:	Without a doubt. These bits, in a drill press, will easily cut through aluminum or brass bar stock.
Question:	Will work on quartz crystal and ir gemstones etc. Jewelry as well
Answer:	DO NOT believe so, it is designed for glass, ceramic, tile etc.
Question:	will this cut clay pottery
Answer:	Probably, just use water to keep the bit cool
Question:	Can these be used on antique glass insulators? (I have no idea how insulator glass compares to other glass
Answer:	That is what we used these on. We used a drill press and made sure the glass was in water to keep the temperature down.

Product features

Diamond Drill Bit Set, Drillpro 10 PCS Glass Hole Saw for Tiles Glass Ceramic Marble Bottles DIY,6mm -- 30mm

Diamond Drill Bits, are also know as Diamond Core Drill Bits, Diamond Hole Saws or Bonded Diamond Drill Bits. They are often called Glass Drill or Tile Drill, but they are much more versatile since they are used to drill glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, slate, marble, granite, light stone, and fiberglass.

Features:

- This is a brand new product

- This diamond bit core drilling removes a complete circle glass, tiles, marble, granite, ceramic or other material and only needs water for lubrication

- Can be used with a standard electric drill (not included)

- Easy to use, high quality, good performance, long life

- Excellent for making clean and accurate hole on glass, tile and marble

- Always use lubricant (water), otherwise the diamond core drill will burn

- Start the hole diagonally, make a round trace and then hold drill drittoSpecifica

Durable

• Nickel-plated with a diamond dust coating offers superior performance and cutting strength.
• Extended service life.This diamond drill bits are high quality and good performance that excellent for making clean and accurate hole.

Model: 10 Pcs 6mm -- 30mm

• 6mm / 12:23 "
• 8mm / 0.31"
• 10mm / 0.39 "to 12mm / 0:47"
• 14mm / 0:55 "
• 16mm / 0.62" 18mm / 0.7 "
• 20mm / 0.78"
• 22mm / 0.86 "
• 30mm / 1.17"

Large chip holes

• Large chip holes to ensure that when the punching smooth, punching accurate.

How to use?

Step 1: Clean the surface and mark down the position of the drill hole, angle drill 45 degrees to start the hole slowly.

Step 2: Keep wet with water.

Step 3: Being drilling at low speeds. Angle drill to vertical position once the hole has appeared.

Step 4: Slow speed down to drill the hole off and for the exit hole to prevent a breakthrough.

Note: If you smell burning, back off! Either your speed is too high or the pressure you're applying is too much. You're drill bit should never be hot to the touch, not even warm. - Slowest speed - Coolant - Minimum pressure

The general rule is the smaller the diameter of your drill bit, the faster drill speed you can use. The harder your material, the slower drill speed you should use.