By resin emery cloth and lining cloth spiral docking of grinding tool can be set on the high speed rotating rubber up tight round for all kinds of metal plane surface, including the inner hole and special Angle of grinding workpiece to MAO fine grinding and polishing aluminum oxide as basic material, the shape of cylinder sand ring into the circle of emery cloth and sand paper, apply to the sticklebacks, surface grinding and polishing, electric and pneumatic tools kit tools supporting sand ring is to use high-grade resin emery cloth and lining cloth spiral docking, use fashion in high speed rotating rubber wheel, Widely used in mold processing, dentistry and other metal, non-metal materials of the outer circle, inner hole and complex surface polishing and supporting DIY polishing tool set。