DuroLock Grade 3 Single-Sided Keyed Cylinder Deadbolt, Kwikset KW1 Keyway, Silver Quality, cost-effective choice for your door hardware needs Dependable replacement for any brand of door hardware Fits 1-3/8" to 1-3/4" thick doors standard 2-3/8" Residential or 2-3/4" Commercial Backset (Adjustable) Includes 3 brass keys