Increase security and peace of mind with this Weiser electronic door lock , and set up a unique code for convenient and controlled home access. This Weiser electronic door lock is easy to use and install, requiring just a screwdriver and no added wiring. The backlit keys are easy to see when coming home at night, and the unit stores up to eight individual codes and one master code. Engage the deadbolt with the push of a button or wait 30 seconds for it to lock automatically. Thanks to the SmartKey technology, you can also re-key the lock as needed in just a few simple steps. This SmartCode electronic lock comes with two backup keys for convenience and installs on doors 1 3/8" to 1 3/4" thick.