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