- 5-digit resettable combination lock for keyless security: easier to manage than 4-digit locks, with the ability to set your own personalised number. - 120 cm long, 12 mm thick, RS18 alloy material: 120 cm length is 20 cm longer than most standard bicycle locks, long enough to lock 2-3 bicycles together; designed to be difficult to cut due to its thickness and material. - Durable steel cable construction: high-strength, thickened braided steel wire that withstands a tensile force of 2.4 KN and a shear force of 7 KN, providing strength and flexibility. The cylinder is zinc alloy, offering impact and break resistance and theft protection. Protective vinyl coating (PVC) helps prevent water and rust, delivering corrosion resistance and durability. - Self retractable and attachment capability: self-retracting design for easy carrying and a free mounting bracket included. The lock can be easily attached around the bicycle saddle and added to other objects; quick installation button enables convenient installation or removal. - Resettable code with default and large code space: enables keyless convenience with one-step code setup. Default code is 00000. The code is resettable, allowing up to 10,0000 combinations, so the chance to crack the code is only 1/10,0000. - Practical use scenarios: - At home or in a courtyard, lock 2-3 bicycles together for secure storage. - At schools, gyms, or community centers, secure multiple bikes at the rack with a single lock. - While traveling or running errands, attach the lock to a saddle or other object for convenient transport and secure locking on the go.