This plate protects nonmetallic sheathed cable or raceway type wires running through wood studs, joists, rafters, or similar structural wood members from accidental nail, screw, or drill penetration. No nails required. Cable Protection Plate, Mounting Accessories, Material Galvanized Steel and Malleable Iron, Silver Color, For Use With Single and Two Gang Boxes, Length 2.56 In., Width 1.5 In., Depth 0.0625 In., Standards UL