Businesses in other non-ferrous metal production extract, refine or process metals that do not contain iron as their main component and are not covered by more specific metal-production categories. This can include metals such as nickel, cobalt, chromium, manganese, tungsten, molybdenum, tantalum and precious or specialist metals, as well as metal recovered from scrap and industrial residues. Production may involve smelting, refining, chemical separation and the blending of metals to create alloys. Customers can expect supplies of these metals in forms suited to further manufacture, including ingots, billets, powders, granules, sheets, rods and other semi-finished materials. Producers may also make specialist alloys or compounds for use in engineering, electronics, chemicals, energy and other industries. Some businesses undertake toll processing, refining or recovery on behalf of customers, while others supply material to manufacturers and metalworking firms.