For keyed exterior doors. Both knobs lock or unlock by key outside or turnbutton inside. Features titanium alloy throwbolt core, anti-pick 6 pin system and ultra-strike for jamb brace. DOOR PREP: 2-1/8 in Cross Bore, 1 in Edge Bore, 1 in x 2-1/4 in Latch Face. BACKSET: 2-3/8 in - 2-3/4 in adjustable. DOOR THICKNESS: 1-3/4 in doors standard and 2-1/4 in doors optional. CYLINDER: 5-pin. FACEPLATES: 1 in x 2-1/4 in round corner. STRIKE: 2-1/4 in full lip. BOLT: 1 in throw. Nickel plated. HANDING: Reversible for right or left handdoors. ANSI/BHMA: Grade 2.