Designed for you to shape, grind and finish your project with precision these burrs can file glass, ceramics, tile, brick, wood, fiberglass, stone, rock carbide, gold, platinum, silver, plastics, metals, and any solid surface. All burrs in this set have a-inch (3mm) shank size, allowing them to be compatible with most die grinders and rotary tools. Includes various sizes of the following shapes: Ball Cone Rounded cylinder Flat top cylinder Tapered Needle point Please note: For long-lasting use please use a lubricant, such as water, when using all diamond-coated tools. Important: Avoid getting counterfeit items. Genuine SE products come with our SE logo on the packaging. SE products are quality items for extremely reasonable prices. SE is committed to providing the customer with the best source for value possible on the market. You will enjoy the quality, function and usefulness this 30-Piece Assorted Diamond Burrs Set with [###] Grit has to offer. SE is a registered trademark protected by US Trademark Law.