Design House 784843 Pro Single Cylinder Deadbolt, Satin Nickel For left or right hand doors; 2-Way Adjustable ANSI Grade-3 Certified Adjusts for 2-3/4" and 2-3/8" backsets; Fits 1-3/8" and 1-3/4" thick doors Single Cylinder; Operated by a key on the exterior and interior twist knob Limited lifetime mechanical warranty; 5-year finish warranty