2 New Diamond Coated Grinding Wheel These are a new set of diamond coated grinding wheel They are great for filing glass, ceramics, tile, brick, plastics, wood, fiberglass, stone, rock carbide, gold, platinum, silver, metals or anything else that is hard Recommended for jewelers, lapidary, hobbies, crafts, modeling, home repair, etc Longevity is assured as the diamond particles are electroplated onto the surface of the metal Can be used with a rotary tool These have a slotted screw to easily replace the wheel Each wheel measures approximately 5/8" x 1/8" (15 x 3 mm) thick with a 1/8" (3 mm) shank Newer versions of the item shown may be shipped, as a result, there may be a slight variation in color and design.