For hall and closet, and all interior doors where a simple latch is all that is required. Both Colonial style knobs always free; no locking mechanism. Security knobs feature full 1" solid core throwbolt, all metal mechanisms, anti-pry shield and pick resistant 5-pin system. DOOR PREP: 2-1/8" Cross Bore, 1" Edge Bore, 1" x 2-1/4" Latch Face. BACKSET: 2-3/8" standard and adjustable to 2-3/8" or 2-3/4" optional. DOOR THICKNESS: 1-3/8" to 1-3/4". CYLINDER: 5-pin. FACEPLATE: 1" x 2-1/4". STRIKE: 2-1/4" full lip. BOLT: 1/2" throw. HANDING: Reversible for right or left hand doors. ANSI/BHMA: A156.2 Grade 3.