Gen2 Mechanical Keyless Lock: Our mechanical keyless entry door lock, with its full mechanical structure, makes it tough for thieves. There is no need for charging or batteries. Just enjoy easy installation and operation. The updated model makes changing the password a breeze, and the adjustable left and right handles provide greater flexibility. Universal for Multiple Doors: This embedded mechanical lock comes with multiple sets of screws and spindles of varying sizes: 2.1' / 55 mm, 2.4' / 63 mm, 2.7' / 71 mm, 3.1' / 79 mm, and is compatible with door thicknesses of 1.4'-2.5' / 35-65 mm. It is suitable for courtyards, outdoor gardens, garages, storerooms, iron or aluminum doors, fence doors, etc. It is easy to install and replace. Pay attention to drilling one more hole, and the front and rear panels should have through holes. User-Friendly Lock Replacement: The lock handles can be adjusted to be used on either side, making it flexible for use. The 2.3' / 60 mm or 2