Shot blasting is to use the appropriate large note and shape of the material for shot blasting, with centrifugal force or compressed air for power, so that the shot blasting with a certain energy impact on the surface of stainless steel, in the stainless steel surface to produce a bumpy, non-glossy surface. Most of the blasting materials used are steel shot, cut steel wire particles, silica sand, corundum, glass balls, etc.