metal limber plates for building purposes, metal plinths, metal pipe; nails, screws, clamps, joints, bolts, clips, square and angle irons, right angle shoulder brackets, door hinges, hinge pins, tangent plates and handles, all made of metal and used as building materials; metal castings in bar, billet, and plate form; metal anchors; rolled, cast, and extruded metal parts for building purposes; sheet metal wire, metal strips, and metal grills