I bought this and it’s not compatible with my second lock for space reasons. Protect your home at the touch of a button with this Kwikset electronic entry door deadbolt from the SmartCode® collection. With 8 customizable access codes, you can quickly enter your home or lock the door without the hassle of keys. The satin nickel finish adds a stylish touch and the backlit keypad makes entering your code effortless, even in the dark. It automatically locks after 30 seconds, so you don’t have to remember when you’re racing out the door. The backup keyway with SmartKey Security™ rekey technology allows you to change the lock in seconds, eliminating the worry of misplaced keys. Simply install this deadbolt with a screwdriver and place on almost any door for keyless home security. 8 customizable access codes strengthen your home’s security and provide keyless entry to guests and family members Satin nickel finish deadbolt with backlit keypad from the SmartCode® collection adds style and security to your entryway AA battery required Fits standard doors (1-3/8-in to 1-3/4-in) and easily installs in minutes with a screwdriver Automatically locks after 30 seconds for peace of mind Backup keyway with SmartKey Security™ rekey technology allows you to change the lock in seconds Limited lifetime mechanical/finish warranty and 1-year electronics warranty Perfect for front, back and side doors 1 in. deadbolt throw