Description10 pieces various shapes rotary grinding stones set. Specific shank fit electric rotary tool, hand drill and pneumatic power tool. Great for grinding, sharpening, polishing, sanding and deburring. Suitable for stone, glass, metal, steel, silver, coppon, mould, arts, etc. Package Contents: 10 pieces rotary grinding stone set Abrasive mounted stone grinding set suitable for trimming, sharpening,polishing and grinding a variety of objects:Mold, metal, plastic, jade, agate and stone, etc. Multiple designs fit into tight spaces for other grinding and shaping needs, such as curved, flat and slotted surfaces.