The Design House Entry Combos make updating your entryways easier than ever with matching locks for two doors. This entry knob accepts a key on one side of the lock and is operated by a turn-button 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). 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 ansi grade-3 certified, which means this knob is rated for residential security. kW1 keyway with entry lock Ka3 - 3 keyed alike per cut case. The Design House 728394 entry knob comes with a 5-year limited mechanical and finish warranty to protect against defects in material and workmanship.