Description 1. Easy to install, With installation instructions or website. 2. No batteries required.100% Stainless Steel 304 mechanical door lock 3. Safe, durable, hand-held, humanized 4. Does not lock automatically (this is a pro or a con depending on your need) Feature The lock will stay unlocked until the handle is lifted up. once unlocked you can come and go as needed without having to re-enter the code The lock is a bump proof pick proof keyless mechanical door lock and it does not require wires, batteries or electricity The lock handle must be "pushed up" to reset clear buttons and lock the lock The lock provides keyless security, the combination can be 4-8 digits with tumblers provide is easy to install ,use and change The lock fits most doors and are all weather proof This lock can be used for exterior as well as interior doors The lock has a lever handle on the outside as well as inside Warm Tips 1.Only for the door opens inward 2.Not deadbolt 3.Only for single bore 4.Need to drill additional 4 holes for the fasteners 5.The handle must be "pushed up" to reset clear buttons and lock the lock 6.Combination password settings can be 4-8 digits, You can enter the number you set to unlock, and can be in any order Specification Maximum borehole diameter 2-1/8" Never grow faded/worn, Anti-friction spring latch BOTH 2-3/8"(60mm) & 2- 3/4"(70mm) Backsets/Latches 50.60 single tongue lock body Dimensions:195x62mm(Full Size),Wood or metal, plastic door thickness within 35-50mm Package Included: 1 x Handle Door Lock Set (Necessary bolts are included)