Features: brand new and high quality Sufficient combination of numbers: 1-11 digits password can be set, it is recommended that the password be set to 5 digits. The C for key is the clear for key, and the rest of the keys are password keys (including Y for key). No battery: Full mechanical digital for key code door lock, no battery, no electronic circuit, mechanical principle, low carbon and environmental for protection. Granular button: waterproof, anti-theft, high temperature resistance, easy to use. Applicable door thickness: Approx. 35-60mm/1.38-2.36inch. Scope of application: office doors, interior doors, rental doors and other places wooden doors, composite doors. Specifications: Material: Zinc Alloy Color: Black/ Green Bronze/ Red Bronze/ Silver Length: Approx. 14.2cm/5.59inch Applicable Door Thickness: Approx. 35-60mm/1.38-2.36inch Package Includes: 1x Door Lock note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.