13 best bike chain locks

Product description

The Master Lock 8143D Preset Combination Cable Lock is 4ft (1.2m) long and features a 5/16in (8mm) diameter braided steel for maximum strength and flexibility. The protective vinyl coating protects against scratches. The 4 dial combination security offers keyless convenience. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.

• Bike lock is best used for basic security as a theft deterrent
• Preset four-digit combination bicycle lock for keyless convenience; combination cannot be changed
• Bike lock cable is self-coiling and features braided steel for strength and flexibility
• Protective vinyl coating prevents the cable from scratching your bike
• Bike cable lock is 4 ft (1.2 m) long with 5/16 in. (8 mm) diameter cable (includes vinyl coating)

User questions & answers

Question:	How water-resistant is this lock
Answer:	I have had it outside for a while in the rain, with no issues. However, if gets cold enough to freeze, the lock stiffens up quickly.
Question:	I cant open the lock !! the code isn't listed anywhere
Answer:	did not have a lock code tag when it arrived.
Question:	What is the diameter of the loose end that goes into the lock? I need it to fit inside of a 5/8 inch hole
Answer:	Loose end is 5/8 diameter
Question:	Can you set your own combination
Answer:	According to the Manufacturers website it is a fixed combination.

Product features

Factory Set Combination

Four digit combination security for keyless convenience. Suggested for use as a bike lock, gate lock, lawnmower lock, and ladder lock.

Strength & Security

High-performance braided steel cable provides strength, flexibility, and resistance to cutting and sawing. Protective vinyl coating for added weather and scratch resistance.

Convenience

Self-coiling design for easy use and storage.

• Keyless Secure Lock Mechanism: This bike chain lock has advanced 5-digit combination lock, allowing up to 100,000 possible codes making it nearly impossible to crack. Keyless convenience
• Durable Cut Resistance Cable: This bike lock cable is made from 0.27 inch extra thick manganese steel for cut resistance and protective zinc-plated coating to prevent from scratching
• Easy To Set/Reset: Easy to set and reset your own personalized number combination
• Long Flexible Cable: This bike lock is 3.2 feet long, ideal for bicycles, bike, ladders, lawnmowers, gates, fences, tool boxes, bbq, sport equipments and etc..
• Waterproof & Dustproof Cover: A flexible cloth sleeve which covers the chains to protect it from being scratched and sawed, long lifespan

User questions & answers

Question:	how thick is the steel
Answer:	Thanks for the question. Kindly be advised that this bike lock cable is made from 0.27 inch extra thick manganese steel for cut resistance and protective zinc-plated coating to prevent from scratching. Thanks.
Question:	what are the specs on this. prop 65 warning
Answer:	I have not heard about a warning I have no problems with my lock
Question:	My lock got jammed and won’t reset and the combination is not working? What should I do
Answer:	You can try greasing the mechanism with some WD-40 or some silicone and seeing if that will give you enough lubricant to twist it and get it to reset. I have not personally had this problem with the lock, but I have had that issue with other locks and if that won't help then you might just need to buy another one
Question:	What if I forget the combination
Answer:	Use a combination number that means something to you. Your birthday, an important date in history etc. To back that up, enter the number in your phone directory.

Product features

Sportneer Bicycle Lock, 5-Digit Resettable Combination 3.2 FT Bike Chain Cable Locks

Protect your bike against theft with Sportneer's Secure Advanced Bike Chain Lock. The 5-digit combination allows up to 100,000 possible codes making it nearly impossible to crack.

Best of all, it allows for keyless convenience. It is built to last, with durable cut resistance cable made from manganese steel and an protective exterior coating to prevent from scratches.

Durable Cut Resistance Steel Chain Lock

This bike lock cable is made from 0.27 inch extra thick manganese steel for cut resistance and protective zinc-plated coating to prevent from scratching.

Specifications:

-Item Weight: 1.48 pounds

-Item Size: 39" L x 0.27" D

-Package Dimensions: 6" x 4.8" x 2.8"

-Material: High quality manganese steel chain

Package Includes:

-1x Combination Bike Lock

Premium Strong Lock Components

Solid Zinc Alloy Cylinder with strong lock plug allows you to have peace of mind knowing your bike is locked and secure.

This bike chain lock has advanced 5-digit combination lock, allowing up to 100,000 possible codes making it nearly impossible to crack. Keyless convenience!

Product description

Features - 10mm six-sided chain links made from Kryptonite’s high-performance 3t manganese steel - Patent-pending integrated Evolution 4 lock head - New patent-pending pin-less link design secures chain to hardened deadbolt with no “weak” links - NEW Patent-Pending Hybrid cylinder design provides higher levels of defense against picking while increasing its ease of use when locking and unlocking (running change) - NEW key fob design with a modular LED replaceable key fob (running change) - $2250 (USD) Anti-Theft Protection offer included in the USA and Canada - Weather-resistant nylon sleeves prevents scratches - Compact coiling for easy carrying - Includes 3 stainless steel keys: 2 “I” keys and 1 with high-intensity LED bulb for use in dark - Lifetime Key Registration & Key Replacement Service available-Key Safe program - 8/10 security rating

• 10mm six-sided chain links made of 3t manganese steel
• High security disc-style cylinder
• patent-pending pin-less link design
• Patent pending integrated Evolution Series 4 lock head
• Length 5.25

User questions & answers

Question:	If the thieves take the lock after breaking it, will kryptonite still honor the afpo coverage for the bike if there is no photo of the broken lock
Answer:	You'll have to ask the Kryptoinite people to know for sure but NOBODY is going to want to lug around a broken one of these heavy things. It's seriously a beast.
Question:	Is the length 160cm
Answer:	Yes
Question:	Can this be cut with bolt cutters
Answer:	With time and privacy, pretty much any chain can be cut. But it would be rather difficult and would probably require much heftier bolt cutters than would be carried by the typical bike thief.

• 14mm six-sided chain links made of 3t HARDENED MANGANESE STEEL for ultimate strength
• Durable, protective nylon cover with hook-n-loop fasteners to hold in place
• Includes maximum security New York Disc Lock with 15mm MAX-PERFORMANCE STEEL SHACKLE
• Patented*, oval hardened STEEL CROSSBAR for extra security
• Hardened DOUBLE DEADBOLT locking for extensive holding power
• HIGH SECURITY DISC-STYLE CYLINDER with reinforced anti-drill, anti-pull protection system
• SLIDING DUSTCOVER protects and extends cylinder life

User questions & answers

Question:	Can the lock be threaded through any link in the chain or only the end links
Answer:	The first few links are not covered so you could easily thread the lock through them.
Question:	Would the 5' chain be long enough to chain a bicycle frame to a pole slightly smaller than a telephone pole
Answer:	It is a factor of how much room you have to maneuver the chain (distance between the bike and the pole$ and how much of the bike you want to lock up. I need to include the rear wheel and the frame. But at five feet that still gives you 2.5 feet distance from bike to pole. So I would say yes
Question:	why does the shorter chain (1410) weigh more at 15.25 lbs and the longer one (1415) is 10.8 lbs? Is that a typo from manufacturer
Answer:	Not sure but this is the best lock in the world! I have tested it in NYC And San Diego
Question:	Can it be cut with a 42 inch bolt cutter
Answer:	Wayne winton does a video about this very subject. He is a professional lock smith. He does this stuff for a living. The answer is yes you might be able to cut this chain with 42" bolt cutters if you had a peefect scenario, but he couldn't seem to get his high end 42s with sharp blades and perfect leverage to touch this chain. You can look the videos up on youtube. Honestly, id be more worried about angle or die grinders getting this than any bolt cutter unless it was a high end electric over hydraulic cutter that most people are not going to have.

Product features

New York Fahgettaboudit Chain and New York Disc Lock (1410 and 1415)

Chain Size

14mm six sided chain links made of 3T manganese steel.

Anti-theft Protection

Register your product online to activate the optional Anti-theft Protection. In the unlikely event the product is defeated when used properly Kryptonite will pay out up to a certain value depending on the security value of the product. Visit our official website for further information. T&C’s apply.

Key Safe Program

Register your keys online and Kryptonite will ship you 2 keys, globally, in the event you lose them.

Stainless Steel Keys

3 stainless steel keys — including new key design and one LED replaceable key fob.

Product description

Specifications:

Length: 98 cm/38.64 in

Diameter: 9 mm

Weight: 1.35kg/2.97 Ib



Material: high strength steel, manganese steel, nylon fabric

Tips: Please allow for minor errors due to manual measurements.

Package Included: - 1 x FUBOZONE chain lock - 1 x storage bag - 2 x Plum shape key



The FUBOZONE brand is based on the customer-oriented philosophy, pursuing excellent quality, affordable price and perfect service to win the trust of customers.

• MAXIMUM SAFETY: Bicycle chain lock is made of high-strength manganese steel, the lock core is multi-layer DISC lock core, all-round anti-saw and anti-drill, technically up to grade B, with strong resistance to cutting and anti-saw. It is the patron saint of item safety.
• PERFECT DESIGN: Chain length is 98 cm, diameter 9 mm, optimal length and thickness. The lock cylinder has a waterproof and dustproof cover, the key is also unique, the plum shape and the anti-theft function are stronger.
• INTIMATE SERVICE: The bike lock is covered with non-toxic nylon belt, will not scratch the bicycle, motorcycle, each chain lock has a sturdy and beautiful carrying case
• APPLICATION:bicycles, motorcycles ,sports equipment, garage, farm, fence, tool boxes, electric cars, handcart,Shop，Glass door，And various security applications.
• 100% MONEY BACK GUARANTEE: Please rest assure to purchase this product. If you are not satisfied for any reason, please contact us and we will be happy to assist you. Or simply return the product for a full refund.

User questions & answers

Question:	Can i use this to lock my gate my child decided to be Houdini the other day and that cant happen again
Answer:	If a child gets past this lock, give them to Penn & Teller. It’s a sturdy, well made lock with unusual key slots.
Question:	Could I lock two of these together end to end
Answer:	Hello, the chains can be entangled and the ends can be tightly locked together. Thank you.
Question:	What tool(s) could cut this chain? Diamond or carbide grinder work? If so, how long would it take? lost 6k in bikes over the years .. extra paranoid
Answer:	Likely your basic bolt cutters. Chain is of low quality and is not the claimed 9mm. Most bike thieves would likely defeat this lock in under 30 seconds. Use it as a theft of opportunity deterrent only.
Question:	Can this be used to lock my helmet to my bike
Answer:	Yes you can. It’s long enough to lock your helmet to your bike.

• Secure & portable: The key can only be pulled out when locked, which prevents the key from being lost. Titanker bike lock comes with 2 keys. You can take one of the keys to use in daily life, and you can leave another key at home in case you accidentally lose on
• Heavy duty high quality: With 6mm thicker security heavy-duty chain links, our bike lock is made of heavy-duty steel known for it cut-resistance. Lubricate the lock hole and keyhole regularly, this will prolong the lock's service time
• Protective cloth sleeve & dust Cover: Chain is enclosed in protective cloth sleeve, which effectively protects the chain from rusting and scratching
• Easy to lock: You don’t need the key to lock, just snap it together go when you lock it. Safety Tips: Never leave your bike locked outside for long periods of time. Especially in high crime areas. No bike lock is 100% secure
• Portable safe size: The overall length of the chain lock is about 3.3 feet. The links are about 1.97 inches long and about 0.23inches inch thick. Lock Weight: 1.76 pounds

User questions & answers

Question:	How wide is a chain link? I'm trying to fit it through about a 1 inch hole
Answer:	We use it to lock the sliding barn doors together. I'm guessing that the chain and the covering will not fit through an inch hole. It is a very nice lock.
Question:	Is it long enough to lock to a post and through the front wheel and frame
Answer:	Yes it is. Great lock for the price. Have not had any issue. Quality is great
Question:	Is the weight difference between the 6mm and 8mm worth it, harder for thieves to cut the 8mm than the 6mm
Answer:	Yes I believe it is worth it.
Question:	Where is the key hole? All i see is some button that wont push down despite all my might
Answer:	Gently slide red tab button to the center of lock where you would place the key.

• SECURE & RESETTABLE: Smart 5-digit resettable combination chain lock, much safer than other 4 digit locks. Easy to set your own personalized number combination.
• BRAIDED STEEL & PVC COATING : The bike cable is made of high strength braided steel wire, which can withstand 2.4KN tension and 7KN shear force, more strength and flexibility. And the protective vinyl coating(PVC) helps prevent scratching more durable wear.
• SELF COILING & MOUNTING BRACKET :4 Feet by 1/2 inch cable is long enough for different users; Self coiling design make it easy to carry; Equipped with complimentary mounting bracket, the lock can be easily added to other objects; The quick installation button makes it install or remove the lock conveniently.
• CONVENIENT TO USE: Combination locking mechanism provide keyless convenience and set your own password by easy steps. With keyless convenience lock, you don’t worry about lost the key and forget to carry it.Code design saves you from the hassle of carrying keys. The code is resettable - there are 10,000 combinations you can set, which makes the chances to crack the code only 1/10,0000. The default code is 00000.
• MULTI-PURPOSE: The cable is 4 feet, long enough to lock 2-3 bikes together, or lock your bike to a tree, gate, fence, railing, thick pole and others. The lock can also be used for motorcycles, scooters, skateboards, grills, ladders, doors, lawnmowers and many others.

User questions & answers

Question:	Can it connect my wife's thoughts with mine together? There will be no arguing about trifles
Answer:	No sadly. There's no understanding a woman's thought process.
Question:	Can 2 or more of these locks be connected in series to form a longer one or is "key" end unique to each so won't fit into "barrel lock" end of another
Answer:	This is a very good question. I deliberately removed two locks for testing, carefully looked at their shape, the shape is the same, so multiple can be connected in series, after testing is also possible.
Question:	When i set up the lock and picked a combination. of course i didn't write it down so i forgot it. what can i do
Answer:	Set combo to 00000 to open. Rotate set knob clockwise. Set your new combo. Rotate set knob counterclockwise.
Question:	my lock will not unlock. I put in my set passcode but still will not open. Anyone have issues with this
Answer:	It just happened to me. I set my own password and it won’t open. It seems like reset knob is so loose so when I lock my key, it turn itself and set password whenever the code I locked. It sucks. Anyone has idea to unlock?

Product features

Step 1

Set the default combination "00000" at the line with two bumps to open the lock.

Step 2

Rotate the "RESET" knob 90 degrees right.

Step 3

Turn the dials to set your new personal combination. such as "00009".

Step 4

Rotate the "RESET" knob 90 degrees left to the original position.

Product description

KILAKILA Heavy Duty Security 10mm Chain lock



SPECIFICATION:

Inside the packing are: 16mm mini U lock +900mm/1200mm/160mm/2000mm chain+2 key

Color: Black

Weight:

3 FT: 2.9kg / 6.4lb

4 FT: 3.1kg / 6.8lb

5.25 FT: 4.95kg / 8.7lb

6.56 FT: 4.55kg / 10lb

Size (There are four lengths to choose) :

0.9M/35inch: 900x12mm / 3 FT

1.2M/47inch: 1200x12mm / 4 FT

1.6M/63inch: 1600x12mm / 5.25 FT

2M/79inch: 2000x12mm / 6.56 FT



Heavy Duty Motorbike Lock Features:

1. Alloy steel material, effective anti smashing, anti violence open, anti hydraulic scissors, high safety factor.

2. Powerful lock, wheel、frame、cushion a lock protection. solid steel chain, one lock, multiple locks, locking fixtures.

3. Strong anti-theft, steel chain and U-lock double protection, high safety performance.

4. An affordable U lock for moderate crime areas 12 mm hardened steel shackle Reinforced collar over key way for increased protection High security disc style cylinder High security Bent Foot design that are more ergonomic and reduce the amount of torque being applied, to stop them bending or breaking.

5. The clever design of U lock, the gray part can rotate to block and protect the lockhole, effectively waterproof, dust-proof and rust-proof, prolong the service life of the lock. The lock body is made of solid steel. After professional testing, 16 mm thick KILAKILA U lock needs to use professional cutting tools to hard cut at least 180S. Effective prevention of thieves.

• 【STRONG CHAIN】： 10mm square chain is made of high strength hardened manganese steel, with higher hardness. Anti-saw and anti-shear, higher safety. Anti-rust coating on the surface of chain, anti-corrosion and anti-rust.
• 【HIGH SECURITY】 ：Powerful locking, 16mm thick U lock, super anti-drilling design, anti-damage, with chain double protection, high safety performance. The dust-proof cover of the lock head is cleverly designed to prevent the lock head from entering water. Dust proof and rust proof,prolong service life.
• 【WIDE USE】 : Perfect for everyone and applicable to motorcycles, electric cars,electric bikes,cars, tricycles, doors, grills, ladders. The chain lock is a perfect solution for protecting your bicycle and motorcycle, ATV or other valuables against theft.
• 【DURABLE】: Nylon sleeve cover provides additional protection and helps prevent scratches on your bike/motorbike. U lock surface is made of non-toxic PVC material and reinforced rust alloy steel chain, in line with EU environmental standards.
• 【SPECIFICATION】: 1600mmx10mm (with 32 chains,durable steel and sturdy ABS material ensure the safety of your motorbike.) There are four lengths for you to choose from to meet your needs.

User questions & answers

Question:	What is the Rockwell hardness rating for the steel of the chain
Answer:	9
Question:	I want to order the 4ft lock
Answer:	Hi! We have 4 lengths to choose from: 3-Feet, 4-Feet, 5.25-Feet and 6.56-Feet. If you want to buy 4feet heavy chain lock. You can choose 1.2m / 4-feet in the option area. Thank you for your question.
Question:	Does the shackle engage on both sides, requiring both sides to be cut to defeat the lock? Or does it only engage a shackle notch on one side
Answer:	You need to cut twice the remove chain. It doesn’t swivel.
Question:	What is the security rating
Answer:	99percent

Product description

Now available in 3 new colors: grey, red, & purple. 7mm four-sided chain links made from 3T MANGANESE STEEL. Patent-pending END LINK DESIGN secures chain to hardened deadbolt eliminating critical vulnerability. Hardened DEADBOLT DEDSIGN provides extra holding power. HIGH SECURITY DISC-STYLE CYLINDER is pick and drill resistant. Includes 2 NEW ERGONOMIC "I" KEYS. Durable WEATHER-RESISTANT nylon sleeve prevents scratches. Key Safe Program. Product dimensions: 33.5” (85cm) chain length.

• Now available in 3 new colors: grey, red, & purple
• 7mm four-sided chain links made from 3T MANGANESE STEEL
• Patent-pending END LINK DESIGN secures chain to hardened deadbolt eliminating critical vulnerability
• Hardened DEADBOLT DEDSIGN provides extra holding power
• HIGH SECURITY DISC-STYLE CYLINDER is pick and drill resistant
• Includes 2 NEW ERGONOMIC "I" KEYS
• Durable WEATHER-RESISTANT nylon sleeve prevents scratches

User questions & answers

Question:	Will a KryptoFlex cable loop over the chain end to secure things like the seat & front wheel that the chain may not reach from the back wheel/frame
Answer:	Yes.. just take a measurement & make sure it’s the right length you need & the thickness is correct for whatever you want it for
Question:	Is this large enough to lock two cruisers together and to a pole
Answer:	It depends, it won't work if you want to lock the frames and one wheel of each bike. If you just wan't to lock the frames of both bikes to a post you should be fine.
Question:	Does this product have a warranty like the Kryptonite U lock
Answer:	Yes, but for this particular lock, which has a security rating of 5, you will have to pay 9.99 to register the key for the first year...and if you want 5 year coverage, it will cost 29.99. see: http://www.kryptonitelock.com/en/customer-service/register-for-anti-theft.html
Question:	can i wrap it around both tires? so my tires dont get stolen
Answer:	Not long enough to reach both tires

Product features

Keeper 785 Integrated Chain - Black

Chain Size

7mm four sided chain links made of 3T manganese steel.

Anti-theft Protection

Register your product online to activate the optional Anti-theft Protection. In the unlikely event the product is defeated when used properly Kryptonite will pay out up to a certain value depending on the security value of the product. Visit our official website for further information. T&C’s apply.

Key Safe Program

Register your keys online and Kryptonite will ship your first 2 keys for free, globally, in the event you lose them.

Stainless Steel Keys

Includes 2 stainless steel keys.

Product description

Safe chain lock to protect your bike from theft.

Keyless locking, you just need to insert the locking bolt easily.

The strong and durable manganese steel chain makes this lock with high hardness and powerful anti-theft function.

• Keyless locking: This is a simple locking mechanism. It is designed to be locked by inserting the locking bolt, which is fast and convenient.
• High-quality metal material: Made of high-strength durable metal material, which is strong enough to provide an anti-theft performance.
• Thicker chain lock: This 6mm diameter thick chain is treated with multiple heat processes, improving the hardness and density of the lock. The shear resistance, tensile resistance and corrosion resistance of this lock make it more safe.
• Double groove lock cylinder: The lock cylinder is made of high quality material, which is durable and wear-resistant. The precise lock cylinder structure makes it difficult for thieves to open with master keys, ensuring the safety of your property.
• Polyester protective sleeve: A high-quality polyester protective sleeve is used to make the lock more smooth, durable and wear-resistant. It won’t scratch the body, protecting the perfect appearance of your bicycle.

User questions & answers

Question:	Where is this made
Answer:	On earth
Question:	how long is the chain
Answer:	The total length of the lock is 3.3ft, and the length of each little chain is 1.97". Thanks!
Question:	Is the lock housing made out plastic
Answer:	Yes, it’s made out of hard plastic.
Question:	What is the length of chain
Answer:	The total length of the lock is 3.3ft, and the length of each little chain is 1.97". Thanks!

• Cinch Chain | 3' 3" Cinch Ring Security Chain
• 3' 3''chain has 1/2" triple heat treated manganese steel links
• This security chain is designed for use in high risk locations
• Resists attacks from bolt cutters, saws, hammers and chisels
• Cinch ring design for more usable length and ease of use with Schrage high security padlocks

User questions & answers

Question:	Can this support 250 kg of tension
Answer:	Maybe you should contact Schlage. Looking for technical specs from Amazon consumers is a fool's task.
Question:	Is this chain actually 39" (it says
Answer:	39" = 36"+3" where 36" is 3'
Question:	What is the width in between the links? i'm wondering if my kryptonite u-lock will fit in between them so i can use them together
Answer:	I have this chain and the Kryptonite Fahgetaboutit mini lock and the lock will not fit through the links, it is just a tad bit too thick. However I used a knife to cut away about an inch of the rubber around the end of the lock and I can fit the link just on the edge of the lock
Question:	will it work with an Abus 37/80 pad lock
Answer:	Yes. Sort of. You can put the end length thru the Cinch Ring and then attach the Abus 37/80 lock on any one length you want. The end, once you attach the abus to a length of chain that is all you can do since the shackle is only 22mm clearance. I tried to fit 2 links in the shackle. It doesn't work with 12mm chain.

Product features

About Us

A lot’s changed since Walter Schlage opened his first shop in 1920. At the same time, a lot hasn’t. We’re still meticulous designers, painstaking engineers, and proud craftsmen. Nearly a century later, we’re proud to grace your doors with a growing menu of stylish hardware.

• ★★ HEFTY & STRONG CUT RESISTANT: Our bike lock is made of unbreakable 3T manganese steel, 0.6” / 15mm square-linked chain, strong and tough, can withstand TOTALLY 8KN tension and 17KN shear force providing maximum cut resistance and much safer than most of other chain lock in the market.
• ★★ SCRATCH-PROOF COVER & FRIENDLY SIZE: The chain lock is wrapped by a water-resistant nylon sleeve, which is scratch-proof and wear-resistant, protects chain from scratching your property. 48” / 120cm * 2” / 5cm strong cut resistant chain lock is made of 19 chains, each chain is 5cm (2 in) in width & 8.5cm ( 3.3 in) length & 15mm ( 0.6 in) height, sturdy enough to securely lock your valuables.
• ★★STOUT U LOCK & 4 ERGONOMIC KEYS: Our chain lock comes with 1 sturdy U lock made of 14mm hard zinc alloy shackle and thick PVC coating, strong resists cutting and leverage attacks, ensures your motorcycle safety. 4 ergonomic keys are made of hard and durable stainless steel, never bent or twist.
• ★★WIDELY APPLICATION: This motorcycle lock is 48” / 120cm, long enough to lock 3 to 4 motorcycles together, also ideal for locking lawnmowers, sports equipment, tool boxes, motorcycle & scooter, skateboards, gates, fences, grills, ladders etc. A great gift to friends, families, or students who needs it.
• ★★WARRANTY & CUSTOMER SERVICE: 3-year warranty applies to the bike lock chain, 90-day money back policy, 24-hour online customer service. If you are not satisfied with it, you get a full refund unconditionally. Rest assured.

User questions & answers

Question:	How is it against the kryponite new York Noose
Answer:	I have both. This one arrived today. The chain is actually a bit heavier than the New York, though a few inches shorter. The lock is junk. Much lighter than the NY, case is plastic, and I think I could pick it in no time with a paper clip. Chain is nice for the price, but buy a different lock.
Question:	How do you get the automatic cover to open and allow for the key
Answer:	it's not an automatic cover. You push the red cover up and it uncovers the key hole
Question:	Do all the chains have that circular loop on them
Answer:	No just the end where lock goes the rest of the links are more of a rectangle

Product features

15mm Bike Chain Lock

The BIGLUFU Chain Lock 15 mm chain with fabric sleeve to prevent damage of the

motorcycle's paintwork. This chain lock was made of manganese steel, special hardened steel will allow years to use. This motorcycle chain lock will be a good choice for you.

package Includes:

• - 1 x Chain Lock
• - 1 x U Lock
• - 2 x Ergonomic keys
• - 1 x Chain Lock Bag

HEFTY & STRONG CUT RESISTANT

15mm Hexagonal chain links made of 3T HARDENED MANGANESE STEEL for ultimate strength.

15MM HEXAGONAL CHAIN

Highly wear-resistant, rust-proof and cut-resistant, can withstand TOTALLY 10KN tension and 20KN shear force, providing maximum cut resistance.

STURDY U LOCK

Made of 16mm hard zinc alloy shackle and thick PVC coating, strong cut-resist and leverage attacks, ensures your motorcycle safety.

WATER - RESISTANT NYLON COVER

Wrapped by a water-resistant nylon sleeve, scratch-proof and wear-resistan, protects chain from scratching your property.

150 CM/ 5 FT LONG ENOUGH TO LOCK 4 - 5 MOTORCYCLE

150cm / 5 FT is long enough to lock 4 - 5 motorcycles together.

4 ERGONOMIC KEYS

4 ergonomic keys are made of hard and durable stainless steel, never bent or twist.

• 5-DIGIT COMBINATION: Comes with a 5-Digit resettable combination locking mechanism, this bicycle lock allows up to 100,000 possible codes making it nearly impossible to crack, which is safer than other 4 digit locks. Never need to worry about losing keys.
• HUMANISED DESIGN: The smooth lock head of this bike chain lock is made of PE plastic which helps you turn the lock accurately without blocking. The combination bike lock comes with a flexible protective cloth sleeve which can protect the bike from scratch.
• STURDY & DURABLE: It's hard to break through as the lock cylinder of the bike lock is made of zinc alloy. The bike chain lock is made of 0.24inch alloy steel which is drill-resistant and anti-tech unlocking. It will provide your bike with more safety.
• WIDE APPLICATION: This bike chain lock has a wide application which is ideal for bicycle, motorcycle, gates, fences, grills, tool boxes, ladders, etc. Just use it to freely protect your valuable objects as long as this bike lock is suitable for you.
• PORTABLE SIZE: The total length of this bike lock chain is 36inch and the weight of which is 1.71lb. You can just wrap the combination bike lock on your bike frame or just put it into your backpack to enjoy your beautiful day like never before!

Product features

5-Digit Resettable Combination Bike Lock Brings You More Convenience!

No need to worry about rusty keys, the keys been stolen and too many keys. 5-Digit resettable combination locking mechanism allows up to 100,000 possible codes which makes the bicycle lock impossible to crack. The bike chain lock is easy to set or reset your own personalized number combination. This bike lock chain will bring your life with more convenience!

NOTICE: You'd better to use a combination number that means something to you such as birthday or important date in history ect. You can also enter the numbers in your phone in case of forgetting your pasword.

Wide Application!

1. The total length of this bike lock is 36inch, and the weight of this bike chain lock is 1.71lb. It's portable and lightweight enough to ride around with on your bike.

2. With the length of 36inch, this bicycle lock can be used in different applications, such us bicycles, motorcycles, gates, fences, grills, tool boxes, ladders, hand trucks, scaffolding and so on.

Durable & Sturdy!

1. The lock cylinder of this bicycle lock is made by zinc alloy which makes your combination bike lock more durable and sturdy.

2. The lock head of this chain bike lock is made of environmentally PE plastic, which makes our lock head more smoothly. Compare with other combination bike locks, this smooth lock head helps you turn the lock accurately without blocking.

Notice!

1. Please keep the lock cylinder clean and dry during daily use.

2. Never leave your bike in remote places or leave your bike unattended for a long time.

3. If the lock cylinder is mixed with dust or other debris, or it's difficult to insert or rotate poorly, you can use an anti-rust lubricant to clean the lock hole for several times.