High Security: Offers sensitive password keys and easy operation, allowing users to set up to 111 non-repeating password combinations, significantly enhancing the security of mechanical door locks. This mechanical coded lock requires no power supply, providing added convenience. Keyless Entry Door Lock: A mechanical coded door lock that does not require a key or access card. Simply enter the preset mechanical code to unlock. The code can be changed at any time, offering convenient and secure keyless entry and exit. Easy to Set Up: Features a reset function. If the password is entered incorrectly, press the C key first, then re-enter the correct password to unlock. Password entries do not need to be in sequence. For example, if the password is "Y123", entering "123Y" will also unlock the door. Durable Material: Constructed with a high-quality zinc alloy shell and chrome-plated surface finish, providing effective resistance against wear and damage. Includes mounting screws for easy installation. Wide Application: Suitable for use on sliding doors in kitchens, balconies, offices, workshops, interior doors, rental units, composite doors, or any location where traditional keys are impractical, helping to create a safer living and working environment.