This Residential ANSI Grade 2 certified, Heavy Duty biscuit knob entrance lockset complements both traditional and contemporary residential exterior doors. The backset is adjustable between 2-3/8-Inch and 2-3/4-Inch. This lockset is made to fit doors between 1-3/8-Inch and 1-3/4-Inch. It also features a dead latch style backset, a square corner striker and interlocking tubular chassis. The US3 polished brass finish is protected by a clear powder coat finish. The excellent craftsmanship is backed by Legend"s Lifetime Mechanical Warranty and a 10 year warranty on the finish.