... steel, alloy steel, stainless steel,Aluminum,Brass,Copper,Plastic etc.2.Surface Finish:polishing,chrome,zinc,nickel plating,anodize,power coating ... ,brushing.3.Process:CNC machining,turning,milling,drilling,boring,threading,grinding,lather cutting,welding.4.Application:auto,motorcycle,bicycle,machine,electronic,furniture ...