Aluminum alloys; Back-up boards, back-up sheets, back-up panels, entry boards, entry sheets, and entry panels made out of metal for use in the operation of drilling holes in printed circuit boards; Galvanized steel sheets; Hard solder; Metal bins; Metal boxes; Metal clamp-type fasteners for holding in place curtains, tarps, canvas, cloth and film covering material; Metal cove bases; Metal door units; Metal forgings