5digit code for enhanced security Set a unique fivedigit combination with unlimited code possibilities. The Anti Theft Cycle Chain Lock doesn't require keys. Durable, security construction Built with manganese steel and a zinc alloy cylinder for heavyduty strength. Rustresistant and wearresistant, designed to withstand cutting or prying attempts. Protective cover to extend bike life Features a soft, abrasionresistant fabric cover that guards against rust and paint damage. Helps preserve the finish and extend the life cycle of your bicycle. Easy to set and operate To set the code, open the lock and turn the RESET knob 90 degrees to the right, set your code, then turn the knob to the left. Avoid the confusion of the default 00000 code with simple password adjustment. Use scenarios City errands: secure your bike outside shops, cafes, or transit hubs during short stops. Campus or workplace: lock your bike in public areas while you run inside briefly. Outdoor storage: protect your bicycle when parked outdoors in areas with higher risk of weathering or tampering.