For hall and closets. Both knobs always free; no locking mechanism. 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: adjustable to2-3/8 in or 2-3/4 in DOOR THICKNESS: 1-3/4 in doors standard. 2-1/4 in doors optional. CYLINDER: 6-pin. 5-pin optional. FACEPLATE: 1 in x 2-1/4 in STRIKE: 2-1/4 in full lip. BOLT: 1 in throw. Nickel plated. HANDING: Reversible for right or left hand doors. ANSI/BHMA: Grade 2.