Deadbolt Cylindrical Commercial Lockset Grade 1 Series B660 Lockset Finish Satin Chrome Keyway Type None Key Type Different Standards ANSI A156.5 ADA Compliant Yes Lockset Fire Rating Not Rated Backset 2 3/4 in Ligature Resistant No Faceplate Dimensions 1-1/8 in x 2-1/4 in For Door Thickness 1 3/8 in to 1 7/8 in Includes Hardware Material Brass/Steel/Zinc Number of Keys 2 Security Type Heavy-Duty Strike Square Corner Throw Length 1 in