Stainless Steel 100% Mechanical Keyless Entry Door Lock with Keypads Door Knob, Waterproof Keypad Deadbolt Locks with Handle, Outdoor Front Gate Digital Code Combination Door Lock Set Security (Black), 【Applicable Doors】Work with both left and right handed doors due to adjustable unlocking direction. The mechanical door lock is suitable for indoor or exterior wooden doors, yard doors, aluminum alloy gates, wrought iron doors with 1.38 inches to 2.56 inches (35mm-65mm) thickness. Accessories can be shortened according to the actual thickness of the door., 【100% Mechanical & Keyless】No need to charge and install batteries. Reject complex electronic programming. Keyless entry door locks are easily unlocked by a password. But with 100% mechanical construction, it is so difficult to pry open that provides you with a safer living environment., 【Easy to Set Up & DIY Installation】It is easy to set and change the codes. Combination can be 4-7 digits composed of numbers or alphabets except C button (no repeats), and be used in any order. 14 push bottons greatly improve the security of mechanical combination door locks. Granular buttons with good touch feeling, are easy to enter passwords., 【More Durable & Waterproof】The materials of stainless steel digital door locks, with enhanced anti-corrosion surface treatment performance, is 5 to 15 times that of other materials. So the keypad door knob lock works with waterproof, sun-proof,and advanced rust prevention performance., 【Protect Beauty of Door】There is no need for large area drilling. 2 ways to install the lock keeper, surface (No need to embed the lock plate in the door) and mortice. And the diameter of the installed hole is only 10 mm. The product is equipped with detailed instructions. Before installation, please read it carefully and installation will be simple and fast., ,