Keyless deadbolt unlocks with personal code - no keys required Fully mechanical operation - requires no batteries or external power All-weather design for dependable operation - inside or outside, rain or shine Replaces the existing deadbolt on doors up to 2"" thick Easy installation on any door with standard 2-1/8"" diameter cutout* Universal design for installation on both left & right handed door types One user programmable code can be changed when needed Code can contain up to 10 digits 13-key alphanumeric keypad + clear key Easy to operate deadbolt with large exterior knob & thumb knob on interior Includes all installation hardware and instructions Dimensions: 1.6"" x 5.5"" x 2.2"" 1-Year Warranty *Installation requires drilling additional 10mm hole for mounting screw.