The Design House 728212 entry knob and deadbolt combo accepts a key on one side of the lock and is operated by a turn knob on the other side. Finished in satin nickel and designed for left or right hand doors, this knob fits the two most common backsets in the U.S. (2-3/4-Inch and 2-3/8-inch). this combo pack includes a full 1/2 in. throw and 1 in. Deadbolt throw. Entry knobs are often used on front doors and back doors. Use this knob on standard 1-3/8-inch and 1-3/4-Inch thick doors with a cross bore 2-1/8 in diameter or edge bore 1-1/16 in dia. (1 in. X 2-1/4 in. Radius corner faceplate). This unit features anti-bump pins as an added security measure to keep your door securely shut when locked. This product is anis grade-3 certified, which means this knob is rated for residential security. kW1 keyway with entry lock Ka3 - 2 sets of 3 keyed alike per cut case.