Kwikset Signature Series * For use on exterior doors where keyed entry and security is needed * Single cylinder deadbolt operates by key outside and thumb turn inside * Fits door thickness of 1-3/8-Inch to 1-3/4-Inch * Features an adjustable latch to fit all standard door preparations * ANSI/BHMA grade 2 certified * Includes adjustable backset to fit all standard door preporations