Custom security and keyless convenience 5digit combination lock offers thousands of possible codes, providing secure, key access for your bicycle. safety and durable construction Lock body made of manganese steel and zinc alloy for strong cut resistance and leverage. Rust and wear resistant design to withstand cycling environments. Enhanced durability and paint protection Chain is wrapped in a fabric protective cover to reduce rust and extend service life. Soft, abrasionresistant polypropylene sleeve protects your bike paint from scratches and scuffs. Easy to set up and operate Default code is 00000. To set a code: open the lock, turn the RESET knob 90 degrees to the right, set your desired 5digit code, then turn the knob to the left to save. After setting your code, simply close the lock and scramble the dials to secure it. Specifications and compatibility Type: 5digit combination lock with chain and protective covers Materials: manganese steel and zinc alloy core; fabric and polypropylene protective covers Security: keyless, thousands of possible codes; designed to resist cutting and weathering Use scenarios Urban commute: lock your bicycle to a rack or bike stand while you grab a quick coffee or run errands. Campus or apartment complex: secure your bike on shared bike racks during classes or deliveries, reducing the risk of lost or stolen keys. Outdoor transit or park rides: use at transit stations, parks, or shopping centers where you may be away from your bike for extended periods. Notes Ensure the lock is fully closed and the code is scrambled after locking. Regularly check the fabric and sleeve condition to maintain protective benefits.