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The Kryptonite Keeper 712 is a 4-foot, 7mm thick heavy-duty bike chain lock crafted from 3T manganese steel, featuring an end-link locking point and a 4-digit resettable combination with over 10,000 code possibilities. Rated 5/10 on Kryptonite’s security scale, it’s ideal for quick stops and moderate security needs in urban and suburban environments. The lock includes a hardened deadbolt, pick- and drill-resistant disc cylinder, and a weather-resistant nylon sleeve to protect your bike’s finish. Weighing 4.5 lbs, it balances portability with robust theft deterrence, backed by a limited lifetime warranty.






| ASIN | B078HTBSY6 |
| Additional Features | Portable |
| Best Sellers Rank | #8,419 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #13 in Bike Chain Locks |
| Brand Name | Kryptonite |
| Color | Black |
| Control Method | Touch |
| Controller Type | Hand Control |
| Customer Reviews | 4.6 4.6 out of 5 stars (712) |
| Finish Types | Natural |
| Global Trade Identification Number | 00720018003298 |
| Included Components | Chain |
| Item Dimensions | 15 x 4 x 6 inches |
| Item Type Name | Security Lock |
| Item Weight | 4.5 Pounds |
| Lock Type | Combination Lock |
| Manufacturer | Kryptonite |
| Manufacturer Warranty Description | Limitied Lifetime Warranty |
| Material Type | Alloy Steel |
| Model Number | 720018003298 |
| Recommended Uses For Product | Security |
| Shape | Round |
| Style Name | Chain Lock |
| UPC | 720018003298 |
| Unit Count | 1.0 Count |
D**N
Throw it over your shoulder and ride. Not super heavy but a solid deterant.
Exactly what I was hoping for. the roughly 4' length allows me to simply throw it over a my head and carry it across my torso so the bike itself does not feel any heavier. Keyless is a huge plus as I don't like to have to carry a set of keys with me. Form, function, durability.....easy to use. What else could you really ask for in a bike lock. Did I mention if your bike is stolen they have a $500 cash back?
M**E
Good Bike Lock for Medium Security Needs
Good bike lock for medium security needs. I wouldn't use it for an extended time period like overnight outside in a poorly lit area. Open end fits through the loop of a cable allowing additional protection of wheels and frame. It's heavy but that's a good thing!
R**L
Great product but needs instructions
Love the product, very durable and a great size. However it didn't come with instructions, just the packaging. After some googling found out they usually use 0-0-0-0 or 0-0-0-5 for the default code. The end slides up, then shift the silver button upwards to reset the code
J**E
Good value to the money. Highly recommended.
Heavy-duty lock chain with a simple heavy-duty combination lock. Setting your own combination is easy. It could also be used as a weapon in case of an emergency.
A**R
Good bike lock but will not save your bike if used daily
This is a good bike for general use around a small town and to keep your bike safe from kids/etc while you pop in the shop if you live in a good neighborhood. This is NOT an use in Oakland/Bronx bike other than for just the front wheel. This bike is NOT good enough to be a deterrent if you're thinking "it'll keep thieves from going to easier targets" in those neighborhood. This is a lock you can cut yourself if you forget the combo/etc. Cough up for the evolution (10mm) link [will probably require multiple cuts from a bolt cutter or powered grinder] or the New York series [...probably too much of a PITA for thieves] for that. This chain is already heavy so the additional weight vs. safety is not that much of a factor.
F**R
Great quality but vey short
Super quality however it’s only of value if you regularly lock up to a designated bike rack. It’s not long enough to wrap around most alternative things.
R**O
Easy to setup.
Easy to set combo. Just right length.
M**Y
Almost stolen great lock
Definitely buying a higher rating but bike almost got stolen but they ripped the fabric and barely scratched the chain
C**G
Heavy duty chain lock and its sturdy. Like the protective cover. Combination numbers easy to set and operate. Probably not the most effective anti theft product on the market but it's a price compromise.
M**O
This chain seems solid and I like the convenience of having a combination instead of carrying a key and having to worry about losing it. Quite heavy at 4 and 1/2 lb but that's not a bad thing. It's long enough that I can wear it over my shirt. Looks pretty cool.
B**Y
My E-bike is not going anywhere easily against my will with this lock for sure. Its 2KG and tbh yes its heavy but its durable, and worth it.
B**A
Tenia miedo de que me llegara algo que no cumpliera mis expectativas, pero al tenerlo en mis manos se aprecia la calidad de los materiales, es algo pesado pero creo que si me ayudara a proteger mi propiedad, fue fácil de cambiar la combinación a la personalizada. Yo lo estoy usando para asegurar una llanta de refacción de camioneta y creo que se la pensaran en querer robármela.
C**N
Compre este producto para atar dos bicicletas en un trastero, atada además a una botella de butano. Es fuerte y al ser codificada no tengo que llevar llaves. Estoy muy contenta con él
Trustpilot
2 days ago
3 weeks ago