MiLocks DKK-02SN Indoor Electronic Touchpad Keyless Entry Door Lock, Satin Nickel Keyless door lock with electronic touchpad keypad entry Kindly make sure the connection is not loose Direct replacement for standard door knobs. Security code length: 2 to 8 digits Add up to 6 user passcodes. Min Door Thickness: 1 1/4 inches,Max Door Thickness: 1 7/8 inches Adjustable latch: 2-3/8-Inch (60mm) or 2-3/4-Inch (70mm) 25 year Mechanical Warranty - 1 year Electrical Warranty - Lifetime Finish Warranty