... . 1 ) Main production equipment: CNC turning and milling machine, automatic lathe machine, thread rolling machine, drilling machine, tapping machine, etc 2 ) Measuring & testing equipment: Projector , concentricity ... ) Materials: Different kinds of stainless steel, Brass , aluminum, steel, etc. 4) Finish: Anodized, Polishing, zinc plated , nickel plated , chrome ,etc. 5 ...