Enhanced Security and Convenience Quickrelease lock system with a 4digit adjustable code access. No keys required, simplifying daily use while maintaining strong protection. Change the code easily to keep your security up to date and to share access with trusted individuals when needed. Robust Theft Protection Reinforced lock core built from drillresistant alloy for enhanced tamper resistance. Anticut mechanism and tamperproof structure designed to deter breakins and protect your bicycle. WeatherResistant Durability Nonfading surfaces with a paint protection layer to maintain appearance over time. Wearproof material and scratchresistant coating for longlasting performance in various conditions. Built to withstand environmental exposure with minimal maintenance. Versatile Compatibility and Use Flexible, adjustable chain mechanism enables securing multiple bikes and adapting to different configurations. Practical solution for helmet storage while remaining compatible with common lock setups and accessories. Use scenarios Urban commute or short trips: Lock your bicycle to a rack or post with the 4digit code, eliminating the need for keys while maintaining quick access. Family multibike storage: Secure several bikes in a garage or shared space by adjusting the chain to fit multiple frames, keeping equipment organized and protected. Dorms, campuses, or travel: Rely on the weatherresistant design to protect against the elements and secure gear or helmets for easy access during breaks or between classes.