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Kryptonite

Kryptonite Keeper 712 Bike Chain Lock, 4 Feet Long Heavy Duty Anti-Theft Bicycle Chain Lock with Keys for Bike, Motorcycle, Scooter, Bicycle, Door, Gate, Fence

  • Based on 1,919 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, May 2
Order within 18 hours and 43 minutes
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Features

  • HEAVY-DUTY CHAIN: Made from 7mm hardened steel with four-sided links, this bike lock provides maximum resistance against cutting and leverage attacks
  • PATENTED LOCKING SYSTEM: Features a high-security disc-style cylinder, resistant to picking and drilling, and a patented end link design that securely connects the chain to a hardened deadbolt, eliminating weak points
  • PROTECTIVE FEATURES: Durable rubber coating around helps prevent scratching and wear and tear on your bike. Durable WEATHER-RESISTANT nylon sleeve prevents scratches
  • DURABLE DESIGN: Keeper 712 Integrated Chain extends up to 120cm (47.3 in) in circumference, crafted from 7mm hardened steel links. Heavy-duty bike lock weighs 1.70kg (3.75 lbs). Includes two keys and rated 5/10 for moderate security on our scale.
  • ATPO & KEYSAFE PROGRAM ELIGIBLE: Register to qualify for Kryptonite's Anti-Theft Protection Offer and KeySafe key replacement service

Description

Keeper 712 Integrated Chain Lock features 7mm four-sided chain links made from 3t manganese steel. Patent-Pending End Link Design secures chain to hardened deadbolt eliminating critical vulnerability and providing extra holding power. High security disc-style cylinder is pick and drill resistant; resists most common hand tools. Durable weather-resistant nylon sleeve prevents scratches to painted finishes and protects the chain against the elements. With a 48-inch (120cm) chain length, the Kryptonite Keeper 712 is a flexible, compact and easy to use deterrent security.

Brand: Kryptonite


Special Feature: Anti-theft


Lock Type: Pin Tumbler


Item dimensions L x W x H: 7.09 x 7.09 x 1.18 inches


Material: Alloy Steel


Brand Name: Kryptonite


Recommended Uses For Product: Cycling, outdoor


Number of Pieces: 1


Included Components: Kryptonite 001706


Model Number:


UPC: 720018001706


Model Name: Kryptonite Keeper 712 Integrated Chain


Global Trade Identification Number: 06


Manufacturer Warranty Description: Manufacturer Warranty


Manufacturer: Kryptonite


Manufacturer Part Number: 001706


Unit Count: 1.0 Count


Item Type Name: LOCK


Additional Features: Anti-theft


Lock Type: Pin Tumbler


Controller Type: Hand Control


Control Method: Touch


Smart Home Compatibility: Not Smart Home Compatible


Style Name: Kryptonite Cadena Antirrobo Keeper 712-7mmx120cm Integrado 32" 001706 Black


Color: Black


Shape: catena


Material Type: Alloy Steel


Finish Types: Painted


Item Dimensions: 7.09 x 7.09 x 1.18 inches


Item Weight: 3.7 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, May 2

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Nice and heavy to protect 2 bikes
Color: Black
Nice and heavy duty to protect 2 bikes
Reviewed in the United States on January 31, 2026 by T IN D
    • It's Still There.
Color: Black
Review Image by Douglas Dixon
Review Image by Douglas Dixon
While kind of 'pricey' the thought of losing an item that's costly itself & a necessary form of transportation these days was a huge factor in selection of this security device. As the collapse of society seems more evident every day, the thought of some miscreant 'Coming-Up'... was another motivating factor in investing in a good locking device. This lock is a Beast. It is quite heavy, so those concerned about weight may want to reevaluate choices. In this case, weight wasn't so much an issue. Theft deturent WAS. Cable bike locks can easily be cut with simple cheap cable-cutters quickly. This lock? Not so much. Can it be cut? Yup. Quickly & quietly? Nope. Can it be picked? Yup. Quickly? Nope. Good thick high-test chain was only option. Not liking paint or frame damaged by intense rubbing and/or chain banging, a high-quality sheath was highly motivational in this selection. While the weight can be a drawback, another small issue is the lock cylinder can be a bit finicky at times. However this can be sort reassuring in of itself, by being rather difficult for a novice 'picker' lacking proper tools. Appearance was another deciding factor as it looks tough, rugged & matches bike styling. And... in a 'pinch'...it could make a hellva defensive weapon. 'Peace-of-Mind'... Who can put a price on that? When a beloved 'high-value' item has to be left unattended, it's nice to see that it's... "Right where I left it". ... show more
Reviewed in the United States on October 30, 2024 by Douglas Dixon
    • Best Bike Lock Ever
Color: Black
This is the best Bike lock I have ever gotten . I purchased 2 of these , one for each of our E-Bikes . One night at a campground someone tried to steal our bikes and they could not cut through the chain. It is a heavy thick , very durable chain . I have since purchased one for our genny on our RV . The lock is covered so it won't get wet or dirty .It comes in many lengths and with multiple keys . ... show more
Reviewed in the United States on October 24, 2025 by Amazon Customer
    • Strong lock, cold weather isnt nice to it
Color: Black
very nice lock thicker chains than it seems and the key works easy and fine. maybe not the best for colder climates or seasons as the lock can freeze up. need some wd40 or a lighter to heat up your key to fix that. as for colder climates I mean like 10F or less.
Reviewed in the United States on March 9, 2025 by Nathan Smith
    • Reliable
Color: Black
Review Image by Quintan
Best bike lock i ever tried. Comes with 2 keys and has some weight to it. Very easy to use on the daily. I do a figure 8 wrap around the rim. I forgot I left it on there one time, started up my bike and tried to take off. I jerked hard and broke my chain guard. Very reliable
Reviewed in the United States on January 1, 2026 by Quintan
    • The Ultimate Security for My Escooter
Color: Black
The Kryptonite Keeper 712 is the best bike lock I've used. Its 4-foot length lets me easily secure my escooter to different objects. The heavy-duty design gives me confidence, so I never worry about leaving my ride unattended. This lock provides great anti-theft protection, and I highly recommend it! ... show more
Reviewed in the United States on October 6, 2025 by Ska
    • Great Lock . Period !
Color: Black
This lock is very strong. Not too heavy easy to use and I use it on all of my bikes.
Reviewed in the United States on January 2, 2026 by Casey R. Carlisle
    • Kryptonite Lock.
Color: Black
The Kryptonite Keeper, or any Kryptonite lock, are one of the best locks for your money.
Reviewed in the United States on April 11, 2026 by William Meserve

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