The principle is to use a magnetic field to drive an abrasive steel needle to impact and friction the surface of the workpiece to remove oxides, grease, scratches, and burrs, ultimately resulting in a consistent surface brightness of the workpiece. The advantage is that 360 degree non dead angle polishing and deburring do not damage the surface of the workpiece and do not change the size of the workpiece. Especially suitable for precision parts with irregular shapes such as copper, aluminum, stainless steel, zinc alloy, powder metallurgy, etc. It belongs to physical polishing and can replace traditional strong acid, alkali, and electrolysis processes. It is widely used in fields such as pipe fittings, insulation cups, radiators, automotive parts, refrigeration parts, stretching parts, etc.