Deadbolt, Cylindrical, Commercial, Lockset Grade 1, Series QDB1, Lockset Finish Satin Chrome, Keyway Type C, Key Type Different, Standards ANSI A156.5, Yes, Lockset Fire Rating 3 hr, Backset 2 3/4 in, Ligature No, Cylinder Double, Faceplate Dimensions 1-1/8 in x 2-1/4 in, For Door Thickness 1 5/8 in to 2 in, Includes Hardware, Material Brass, Number of Keys 2, Pins 6, Security Type Heavy-Duty, Strike Dim. 2-3/4 in, Throw Length 1 in