Description: 【Mechanical Password Lock】: This is a mechanical password lock that does not require any power source. It's ideal for iron doors, courtyard doors, passage doors, and outdoor doors. Experience the convenience of a mechanical password system. 【Weatherproof】: Mechanical Door Lock is fully mechanical , waterproof, making it suitable for both indoor and outdoor use. It can withstand high and low temperatures, ensuring durability in extreme weather conditions. 【Keyless Password】: The key password is sensitive and simple using. You can set a 1-11 digit password according to your preference. 【No Wiring Needed】: This fully mechanical digital keypad lock requires no any wiring due to its mechanical principle, making it easy to operate. 【Material & Size】: Password lock is made from copper and zinc alloy for added strength and durability, 4.1cmx14.1cm/1.61inchx5.55inch in size. Specification: Material: copper zinc alloy Size Chart: 4.1cmx14.1cm/1.61inchx5.55inch Package Includes: 1 Mechanical Door Lock Set Note: Please allow slightly errors 1-2cm differences due to manual measurement.