Key Control Deadbolt, Mortise, Commercial, Lockset Grade 2, Series QDB2, Lockset Finish Brass, Keyway Type KC, Kwikset KW1, Key Type Master, Standards ANSI A156.5, No, Lockset Fire Rating Not Rated, Backset 1 1/8 in, Ligature No, Cylinder Single, Faceplate Dimensions 1 in x 2-1/4 in, For Door Thickness 1 3/8 in to 1 3/4 in, For Use With Standard 1 5/32 in Dia Mortise Cylinder with an MS Cam, Material Brass, Security Type Medium-Duty, Strike Dim. 1 in x 2-1/4 in