The Design House 728709 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 oil rubbed bronze 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 dia 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. Designed and manufactured by Design House, the trusted source for quality lighting, hardware, plumbing, kitchen, and bath products for every taste and budget.