Single Cylinder: Single cylinder deadbolts are 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: Tested to exceed ANSI/BHMA Grade 2 security requirements Constructed of solid brass for durability and premium feel Accommodates door thickness 1-3/4" to 2"; up to 2-1/2" with purchase of a thick door kit Limited Mechanical and Limited 25 Year Finish Two keys will be per lock. Three or more items keyed alike will ship a total of 6 keys Specifications: Backset: Adjustable 2-3/8" or 2-3/4" Cross Bore: 2-1/8" Edge Bore: 1" Door Thickness: 1-3/4" to 2" Interior Height: 2-5/8" Interior Width: 2-5/8" Interior Projection: 1-7/16" Exterior Height: 2-5/8" Exterior Width: 2-5/8" Exterior Projection: 3/4" Cylinder: 5 Pin C Keyway Latch Faceplate: Drive-In, Round Corner, or Square Corner