... challenge difficult part ; 3.Professional OEM and ODM service We can design and fabricate complex precision tooling ourselves ... Steel, Mild Steel, Aluminum, Galvanized steel, Spring Steel, Brass, Bronze, CopperFinish mirror polishing, PVD coating, powder painting ... drawing , stamping , punching, bending, CNC spinning, CNC machining, milling, drilling, grinding, Arc welding , seamless welding, straight ...