... Steel,Copper 3.CNC Machining 4.Prompt Delivery,Competitive Price 5.OEM TMM manufactures and supply various investment / precision casting products with Good ... and Brass / Copper Castings with various material grades2. Machining: Turning , Milling, Drilling, Grinding, Threading, CNC Machining, etc.3. Finishing: Sand Blasting, Polishing, Plating ...