Corbin Mortise Lock Case Function Storeroom Mechanical Backset 2-3/4 In. Strike Type ASA Strike Strike Dim. 1-1/4 in x 4-7/8 In. 3 hr Fire Rated Series ML2000 Case Material Steel Satin Chrome Finish Case Size 5-7/8 in x 4 in x 15/16 In. Required Door Thickness 1-3/4 In. For Use With ML2057 Mortise Lock Grade 1 Standards ANSI BHMA UL Includes Front Plate Strike Screws ADA Compliant No