... factory 3.High precision:+/-0.1mm advanced steel box fabrication with your design figures and drawings Professional ... brass, plasticMaking processProgression die, Stamping, deep drawing, Bending, Punching, Threading, Welding, Tapping, Riveting, Grinding, CNC machiningSurface treatmentPolishing, Anodize, Zinc ... to visit our factory! advanced steel box fabrication with your design figures and drawings