Both metals and some non-metals
Metals: carbonsteel/mild steel, stainless steel, aluminum, copper, magnesium, zinc; rare metal andalloy steel(gold,silver,titanium, etc.); specialsurface treatment(aluminum anodized, plating surface, surface oxygen breaking of aluminum and magnesium alloy)
Non-metals: plastics, rubber, resin, carton box, etc.
Electronic components, IC, electrical appliances, mobile phones, plastic buttons, color paper, food packaging, clocks and watches, molds, gaskets and seals, bearing, auto parts,hardware, tools, building materials, PVC tubes, etc.