Yale CA4601 x 630 Cylindrical Knob Lockset, Grade 2, Passage Function, 2 3/4" Backset, 630 Satin Chrome Certified ANSI/BHMA A156.2, Series 4000 Grade 2 Passage Function Non-Locking ADA Uniform Federal Accessibility Standards and ANSI A117.1 UL Fire Listed for Doors Rated up to and Including Three Hours