Heavy Duty Keyless Bicycle Locks For Bikes, Scooters, Doors, Gates, And Fences Keyless Secure Lock Mechanism: Freedom from lost or forgotten keys, combo bike locks with keyless convenience. The chain bicycle lock has advanced 5-digit combination lock, certainly safer than other 4 digit locks, and allowing up to 100,000 possible codes making it nearly impossible to crack. Durable Cut Resistance Cable: Heavy duty anti theft bike chain locks is made from extra thick manganese steel for cut resistance, the lock cylinder made of strong zinc alloy is not easy to be damaged, greatly improves the safety of bicycles Easy To Set/Reset: Easy to set and reset your own personalized number combination. Stay one step ahead of bike thieves with combo chain lock. Note: Initial password 00000. For the specific reset process, you can refer to the manual or video. If you encounter any problems, pls contact customer service to help. One-year warranty service. Long Flexible Chain: The bike locks combination lock is 3.2 feet long, long enough to lock 2 bikes together, ideal for bicycles, bike, ebikes, ladders, lawnmowers, gates, fences, tool boxes, bbq, sport equipments and etc. Waterproof Dustproof Cover: The flexible cloth sleeve made of high-quality polypropylene fabric, which covers the chains from rust and protects bike from being scratched and sawed, long lifespan