Using single-die and multi-die headers as well as straight and sems rollers, Screws Industries provides all standards & special head styles, drive styles, points and threads, starting at #2 through 5/8″ diameter (M2 to M16) and up to 6” in length. Materials offered include carbon steel (low to medium to high), alloy steel, stainless, aluminum, brass, bronze, phos bronze, silicon bronze, and copper.