Mortise Lockset, Style 40H Lock Body, Function Storeroom/Fail Safe, Location Type Commercial, Electrical, 24V AC/DC, Trim Style No Trim, Backset 2 3/4 in, Strike Type ASA, Strike Dim. 4-7/8 in x 1-1/4 in x 3/32 in, 3 hr Fire Rated, Series 40H Series, Case Material Steel, Satin Chrome Finish, Case Size 5-7/8 in x 7/8 in x 4-1/16 in, Required Door Thickness 1 3/4 in, For Use With Hollow Metal and Wood Doors, Grade 1, Pins 0, Number of Keys 0, Standards ANSI, BHMA, cULus Listed, Features Fail Safe