Schlage BE365 CAM 619 Camelot Keypad Deadbolt, Satin Nickel For exterior doors, Pair with a hall and closet knob or lever when replacing a deadbolt and keyed knob on your door Professional Grade security with the biggest adjustable bolt available for increased resistance to kick-ins Pre-set, unique, six-digit programming code, two pre-set unique four-digit user codes (19 code capacity) Weather-resistant, silicon-coated keypad so numbers don't wear off Backlit, simple keypad layout is easy to see and use, even for little hands. Door thickness range: 1-5/8 inch to 2 inch thick standard Keyless entry for enhanced security, no keys to lose or forget Turn knob allows you to feel the deadbolt lock when you turn it Keypad illuminates so you can see it at night Codes easily added or deleted right at the keypad using the lock's unique 6 digit programming code Includes 9-volt battery, a 6 digit programming code, and two 4 digit user codes pre-set at the factory