LockeyUSA 2835 Double Combination Jet Black Digital Door Lock is a 100% mechanical door lock with a programmable passcode that gives you ultimate control and peace-of-mind security. From the tumbler pins, internal plate screws, push buttons, and craftsmanship of the front and back lock housing, this lock is all about safety and performance. This auto-locking mechanical door lock can be used for residential doors, office entry, interior doors, gates, and any vulnerable points throughout your property where you want to restrict access. The ADA-compliant levers are full-size with a weather-resistant finish for lasting wear. The 2835 Digital Door Lock offers a built-in passage feature for occasions where you want to enter and exit freely without entering a punch code. On the keypad housing of the lock you can quickly change the function from normal to passage mode for convenient access. In passage mode, the door will latch shut, but not lock. This comes in handy for office spaces and small businesses where you want to give clients or customers easy access during the day.