The KROM-35DB51C26DWR is a ANSI/BHMA conforming, grade 3, satin chrome(C26D), single (51), deadbolt for door thickness of 1-3/8" to 1-3/4". It has a weiser keyway, and an adjustable backset of 2-3/8" or 2-3/4". It has a precision solid brass 5 pin tumbler cylinder, and it comes with 2 nickel plated brass keys. The latch front is 1"x 2-1/4" square or drive-in, and the latch bolt has a solid brass 1" throw with hardened steel pin inserted. 5 year mechanical warranty.