Holdrite SB3 Wide Stout Bracket Galvanized Steel Telescoping Support System, Pack of 50 Galvanized steel telescoping support bracket Expands from 10-1/4" to 17-1/2" Hole pattern permits attachment of a wide variety of clamps, fittings, J-boxes, outlet boxes Ideal for attachment of both 2-eared and 3-eared shower head and tub spout 90 s Optional nailer tabs can be used for quick attachment to wood studs for positioning purposes