Operated by thumbturn inside, key outside. Security deadbolts feature full 1" solid core throwbolt, all metal mechanisms, anti-pry shield and pick resistant 5-pin system. DOOR PREP: 2-1/8" Crossbore; 1" Edge Bore; 1" x 2-1/4" Latch Face. DOOR THICKNESS:Fits 1-3/8" to 1-3/4" doors. CYLINDER: 5-pin. FACEPLATES: 1" x 2-1/4". STRIKES: 1" x 2-1/4". BOLT: 1" throw. HANDING: Reversible for right or left handed doors. ANSI/BHMA: A 156.5 Grade 3.