For use on exterior doors where keyed entry and security is needed Universal handing; fits both right handed and left handed doors Featuring SmartKey re-key technology; re-key the lock yourself in seconds in 3 easy steps ANSI/BHMA grade 3 certified Features an adjustable latch to fit all standard door preparations Latch has adjustable backset 2-3/8" to 2-3/4" to fit all standard door preparations, Locking mechanism functions with turn piece on the interior of the lock. Comes with 2 keys