Mechanical Keyless Entry Door Lock – No Batteries, No Hassle: This mechanical keyless entry door lock features a sturdy, battery-free design, avoiding the need for keys or access cards. The latch bolt is made of durable zinc alloy, so it is waterproof, rust-resistant, sun-proof, and freeze-proof, ensuring reliable performance in any weather. The lock includes multiple screws and square bolts to fit various door sizes, simplifying installation. Setup is easy with our videos and instructions.