Operated By Thumbturn Inside, Key Outside. Security Deadbolts Feature Full 1" Solid Core Throwbolt, All Metal Mechanisms, Anti-Pry Shield. DOOR PREP: 2-1/8" Crossbore; 1" Edge Bore; 1" X 2-1/4" Latch Face. BACKSET: Adjustable 2-3/8" To 2-3/4". DOOR THICKNESS: Fits 1-3/8" To 1-3/4" Doors. CYLINDER: 5-Pin. FACEPLATES: 1" X 2-1/4" Round Corner. STRIKES: 1" X 2-1/4" Round Corner. BOLT: 1" Throw. HANDING: Reversible For Right Or Left Handed Doors. ANSI/BHMA: Grade 3.