Shank sunflowers purposes: for metal, nonmetal parts slits, slots, etc. root carving polishing, drawing non-metallic surfaces can also be removed burrs. Features: Suitable for cold grinding, the workpiece to be ground according to the case can be made of different layers of products, the withdrawal means flexibility, suitable for machine use, not easy to broken wires, good surface finish and other characteristics. Specifications: diameter (3 '' - 12 '') X layer (4--8) layer X Shank Diameter (6mm) particle number: A40 - A400