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: Adheres toBHMA/ANSI Grade 1 material and mechanical standards Hand finished and polished ensuring a vibrant product to fit in with your decor Constructed solidly, offering you a product which is substantial and sure to last Designed for left handed applications 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" Handing: Left Material: Brass