Metal stamping 1.Material:stainless steel 2.Technique:stamping,welding 3.Finish:passivating 4. ... bending,milling,drilling,tapping,silkscreening,welding,progression die,grinding,riveting,etc.2.Material: stainless steel, brass, copper, aluminum, iron(SGCC,SPCC ... ,SECC),etc.3.Surface treatment: kinds of plating (Zinc, Nikel, Chrome, Tin, ...