Replaces your existing lever or knob on doors with a single hole (no deadbolt) that are 1-3/8" to 1-3/4" thick with just a screwdriver.Note: Measure your door's backset, cross bore and thickness to ensure you find the right fit. Forget fumbling with keys, to unlock just enter your entry code on the backlit keypad. Never hid a key again, create unique entry codes for the people you trust. Delete codes anytime you need to. Enable Auto Relock to ensure your door always locks behind you. Backed by Yale, the world's favorite lock brand since 1840 with a lifetime limited on finish and mechanical hardware. Don't worry about getting locked out with dead batteries, the lever comes with 2 physical keys and has a 9V back-up charger on the keypad Matches your existing hardware's finish and pairs with contemporary or traditional knobs, levers and handlesets. Reversible handing, fits left handed or right handed doors Don't worry about marking your door, the lock has a rubber gasket to protect your door's finish. The lock's touchscreen keypad is backlit so it's easy to see at night and the numbers won't wear off