12 Pcs Wool Felt Mandrel Mounted Grinding Polishing Buffing Wheel Burs Bits Fit Dremel Rotary Tool Accessories Jewelry Polishing Bit made of high quality Australian wool For stainless steel aluminum mill products, jade, silver jewelry, medical equipment and other surface polishing Shank diameter 3MM (1/8").Length:appox 45mm Shape: trapezoid, umbrella, cylindrical, bullet, sharp triangular pyramid, oval, spherical, conical tip, the cylindrical tip, the cylindrical round, flat cylindrical Great polishing kit Fit dremel Make polished goods clean and bright, best used for various mould, glass, medical equipment, metal, and many more