Keyed Entry (Single Cylinder) Function: This single cylinder deadbolt is keyed on the exterior with an associated thumb turn on the inside that can quickly and easily lock or unlock the latch mechanism. Single cylinder locks are most commonly used to secure entrances to a residence or place of business. Features: BHMA Grade 1 Designed for left or right handed doors Includes round, square, and drive in latch to fit all standard doors Includes round corner deadbolt strike Adjustable backset to fit all standard door preparations Lifetime mechanical and finish **Coordinates perfectly with Halifax, Milan, and Lisbon door levers Key Product Attributes: BumpGuard™: Lock bumping is an attack technique used to defeat conventional pin and tumbler locks. Kwiksets BumpGuard™ component utilizes a patented side locking bar which replaces the traditional pin and tumbler design providing protection against lock bumping. SmartKey®: This technology allows you to re-key your lock in seconds with 3 simple steps and features stainless steel racks, pins, and side locking bar for increased strength and security. 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 Projection: 0.5" Latch Faceplate: Round Corner Cylinder: SmartKey 5 Pin