Design House 753285 Cambridge 2-Way Latch Entry Door Knob, Adjustable Backset, Polished Brass Finish Finished in polished brass finish and designed for left or right hand doors ANSI Grade-3 Certified for residential security; UL Listed for use on fire doors (3 Hours) Fits 2-3/4-inch and 2-3/8-inch backsets; Fits 1-3/8-inch and 1-3/4-inch thick doors Entry Lock; operated by a key on the exterior and is by a turn-button knob on the interior. Comes with a limited lifetime mechanical warranty and a 5-year finish warranty