The KROM-22BF72C32D is a grade 2, medium duty, stainless steel (C32D), classroom double (72) knob lockset with a flat rose (F). It is UL/cUL Listed and UL 10C fire rated for up to 3 hours. It is designed for door thicknesses from 1-3/8″ (35 mm) to 1-3/4″ (44 mm). The lockset features a backset of 2-3/4″ (70 mm), a 1-1/8″ × 2-1/4″ latch, and a solid brass latchbolt with a 1/2″ (12.7 mm) throw. It has a precision solid brass pin-tumbler cylinder with a Schlage C keyway, and is supplied withtwo nickel plated brass keys. It comes with a standard ANSI (ASA) curved-lip strike. The product is backed by a five-year limited mechanical warranty.