[5-digit high security] The bicycle lock has a 5-digit combination lock, so there are 100,000 possible combinations that are difficult to decode. [Widely used] This chain lock with Code is ideal for protecting bicycles, motorcycles, scooters, ATVs, strollers, toolboxes, boxes, ladders, gates, doors and fences against theft. [durable] The bicycle lock adopts high-strength alloy cylinder and rigid ABS lock head. Bike Lock uses 6mm thick hardened steel chain, bold alloy steel chain is more secure and anti-theft. The protective cover in anti - UV nylon made of polyester protects the bike from scratches and prolongs the life of the lock. [practical] the steel chain is 600 mm long and weighs 461 grams . It is long enough to lock the bike or the door for easy transport. [convenient] the factory setting is 00000. Follow the steps and the combination lock can be easily replaced with the desired password. Remark: Take and save photos after resetting your password.