Applicable Doors: The keyless entry door lock works with both left and right doors due to the adjustable unlock direction. Also suitable for interior or exterior wooden doors, aluminum alloy doors, wrought iron doors of thickness.Before purchase, please check whether this door lock is suitable for your door thickness and previously drilled holes. mechanical and keyless: no need to charge and install batteries. Simple installation and operation for a high level of anti-theft performance. You can use the passcode to unlock it, but with mechanical construction, our stainless steel digital door lock is so difficult to open which provides you with a safer living environment. Easy to Install and DIY: easy to set and change codes. The combination can be 4 to 6 digits made up of numbers or letters of the alphabet except for the C key (no repetitions), and can be used in any order. 12 push buttons greatly improve the security of mechanical door locks. Granular buttons with good touch feeling, easy to grip.More durable and weatherproof: The digital outdoor gate lock is made of stainless steel, The keypad deadbolt lock is especially hard, more waterproof, sunproof and durable. to rust.Protect the beauty of the door: there is no need to drill a large area. 2 ways to install latch bolt, surface (no need to embed the latch in the door) and mortise. Product comes with detailed instructions. Before installation, please read carefully, and the installation will be quick and easy.