Callan Double Cylinder Deadbolt

Double Cylinder Function: Double cylinder deadbolts are keyed on both sides of the door and are only locked and unlocked via a key. Often times they are used on doors where glass is near the door that could be easily broken and the thumbturn on a standard single cylinder lock would be accessible. Caution: Double Cylinder locks can pose a safety hazard in times of emergency due to requiring a key to unlock. Please check local codes before installing.Features: Meets BHMA security grade 3 requirements Made of durable zinc Fully reversible handing for left or right handed applications Designed for an easy one person installation Comes standard with a round corner latch faceplate and 1" throw Includes a limited lifetime warranty on mechanical parts and a five year warranty on finish Specifications: Backset: Adjustable 2-3/8" or 2-3/4" Cross Bore: 2-1/8" Edge Bore: 1" Door Thickness: 1-3/8" to 1-3/4" Handing: Reversible Left or Right Diameter: 2-1/2" Projection: 15/16" Latch Faceplate: Round