Mechanical Keyless Door Lock – Hassle-Free, Battery-Free Security Reliable Entry Without the Need for Keys or Power Upgrade your home security with this mechanical keyless door lock, offering a simple yet secure solution that eliminates the need for keys, batteries, or access cards. Built with a robust zinc alloy latch bolt, it’s designed to withstand rain, sun, and freezing temperatures, delivering reliable performance year-round. Equipped with multiple screws and square bolts, it easily fits various door sizes, and the installation process is quick and simple, with step-by-step instructions included. Advanced 2nd Generation Design Wide Door Compatibility Rugged Zinc Alloy Build Simple Installation Dual Functionality Key Features Enhanced Keyless Combination System: The 2nd generation mechanical lock offers anti-tamper protection and requires no batteries or power. With flexible left/right handle adjustments and easy password updates, it ensures secure and convenient door access.