Applicable Doors: The keyless entry door lock works with both left-handed and right-handed doors thanks to the adjustable unlocking direction. Also suitable for interior or exterior wooden doors, aluminum alloy doors, wrought iron doors with a thickness of 35-65mm. The accessories can be shortened according to the actual door thickness. Before purchasing, please confirm whether this door lock is suitable for your door thickness and pre-drilled holes. Mechanical and Keyless: No need to charge and install batteries. The simple installation and operation principle provides a high level of anti-theft performance. Easy to Install and DIY: Easy to set and change codes. The combination can be 4-6 digits composed of numbers or alphabets, 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 enter passwords. Protect the beauty of the door: There is no need to