Elemake Combination Lockset Mechanical Push Button Door LockModel: MKD 001 Keyless Entry Door Lock Deadbolt Keypad Mechanical Stainless Steel (Pass Code or Key) Mechanical, No Electronic No Batteries Required: keep it simple, stupid. For those of you tired of fighting your battery door locks. Installation: easy to set the combination and install by yourself. Adaptability: fits most doors, maximum borehole diameter 2 1 8" (Suitable for a wood or metal door thickness of 1. 38 1. 96inch), both left right handed