Keyless access. Allows homeowners to choose whether the door remains locked (with a code required for entry) or unlocked (no code required for entry) by rotating the inside thumb turn. Ideal for garage entry, doors, home offices, storage rooms, etc. Patented commercial grade clutching motor drive. Vandal resistant clutching lever and knob design. Code control: pre-set with random 6-digit programming code and two random 4-digit user codes. 19 user code capacity. 10 eyed to match existing locks. 9V alkaline battery included. Fits most standard door preps. Just a screwdriver needed for installation on pre-prepped doors. Door thickness: 1-3/8 in. to 1-3/4 in. Cylinder: 5-pin solid brass keyed, 5-pin C keyway keyed. Latch: 1 in. x 2-1/4 in. radius corner faceplate, 7/8 in. housing diameter. Triple-option square corner radius corner and circular drive-in faceplates. Strikes: 1-5/8 in. x 2-1/4 in. square and radius corner. Bright brass finish.