Lose Your Keys. For Good. Introducing the slimmest electronic lock for your home; the Assure Lock SL. This sleek and modern touchscreen deadbolt allows homeowners to enjoy the convenience of 100% key free unlocking while enhancing curb appeal. Unlock your home without the hassle of keys by entering your 4-8 digit entry code on the keypad. Lock the door behind you by simply tapping the keypad.