Attention: 1.Only for the left handed door opens inward and The handle must be "pushed up" to reset clear buttons . 2.The handle must be "pushed up" to reset clear buttons and lock the lock. !! How will a Mechanical Door Lock work for you? 1. Combination can be 4-8 digits with tumblers provided,over 8,000 Options. 2. Safety ! Easy to install,No batteries to give out. 3. Accent Lever Design,100% Stainless Steel 304 mechanical door lock. 4. Does not lock automatically (this is a pro or a con depending on your needs It will stay unlocked until the handle is lifted up. That is perfect. once unlocked you can come and go as needed without having to re-enter the code.. It will stay unlocked when you inside . You can open the door anytime without enter the password. This lock does have a lever handle on the outside as well as inside. The handle must be "pushed up" to reset clear buttons and lock the lock. They provide Keyless Security, are easy to install and use, fit most doors and are weather resistant. This lock can be used for exterior as well as interior doors. Keyless Spring Latch Door Lock. Corrosion Resistance Never grow faded/worn LIFETIME MECHANICAL WARRANTY BUMP PROOF PICK PROOF Anti-friction spring latch BOTH 2-3/8"(60mm) & 2- 3/4"(70mm) Backsets/Latches 50.60 single tongue lock body Combination can be 4-8 digits with tumblers provide,Easily Changed Dimensions:193x62mm Package Included: 1 X Left/Right Handle Door Lock Set Instruction Book