Operated By Key Outside And Thumbturn Inside. Signature Series Deadbolts Feature Titanium Alloy Throwbolt Core And Ultra-Strike For Jamb Brace. DOOR PREP: 2-1/8" Or 1-1/2" Cross Bore, 1" Edge Bore, 1" X 2-1/4" Latch Face. DOOR THICKNESS: 1-3/4". Includes 3 Anti-Pick Top Pins. FACEPLATES: 1" X 2-1/4" Round Corner. STRIKES: 1-1/8" X 2-3/4" Round Corner. Includes Ultra-Strike Door Jamb Brace With (3) 3" Screws. BOLT: Brass Bolt, Full 1" Throw. Titanium Alloy Throwbolt Core. HANDING: Reversible For Right Or Left Hand Doors. ANSI/BHMA: A156.5 Grade 1. ADA: Satisfies Section ADA 4.13.9 Requirements. Deadbolts With "SmartKey" (Denoted SMT) Feature Allow, In 3 Steps, Locks To Be Re-Keyed To A Spare Set Of Keys. When The Spare Keys Are Done Being Used, The Lock Can Be Re-Keyed Back To The Original Set Of Keys; Can Continually Be Re-Keyed.