Schlage B560 Single Cylinder Deadbolt Lock, Bright Brass Door range: 1-3/8″ to 1-3/4″ thick (35 mm to 44 mm) standard. Keying: 6-pin tumbler standard “C” Keyway with two keys per lock. Backset: 2-3/8″ (60 mm) or 2-3/4″ (70 mm) adjustable backset standard.