The Rockwood 481 Door Stop Is Floor Mounted Heavy Duty For High Traffic Commercial Applications. The 481 Door Stop Is made Of Solid Cast Brass Material with DuraFlex Bumper. SIZE: Base: 2 1/2" x 1 3/4" Projection: 1 5/8" FASTENERS: 3 ea. #12-24 x 1" Flat Head Machine Screws, 3 ea. Lead Anchors. See Manuf Spec's