Door Stops, Concealed Mounting, Height: 3-1/8", Base: 2-1/4", ANSI A156.16: L12131, Fasteners: 1 ea. 5/16"-18 x 2-5/8" MS Stud, 1 ea. 1/16"-18 x 2-5/8" SMS Stud, 1 ea. Plastic Ancor and 1 ea. Lead Expansion Shield, Satin Chrome Plated