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. | Vevor | | Mechanical Keyless Entry Door Lock, 14 Key Mechanical Door Lock, Mechanical Keypad Door Knob, Single-Side Stainless | Silver | Best Buy