Box Mounting Bracket, Three Box Fixed Position, For 16 In On Center Studs, Mounts to 2 1/2 In or 3 1/2 In Studs, Length 15 In, Width 15 In, Depth 0.0625 In, Box Type 4 In or 4 11/16 In Square, Material of Construction Galvanized Steel, Standards UL For indoor use in noncorrosive environments, this bracket positions electrical boxes, plaster rings, and low voltage devices between studs. A fold-back stabilizer leg prevents the bracket from being pushed back into the wall cavity during sheet rock installation.