You can use the SE Diamond Burr Set (20 PC.) for etching, fast cutting, filing, grinding, sanding, and shaping with detail and precision. You can use this on brick, ceramics, fiberglass, glass, gold, hardened steel, marble, metal, plastic, platinum, rock carbide, silver, stone, tile, wood, fiberglass, and any solid surface. All burrs in this set have a 1/8” shank diameter size, which allows them to be compatible with most die grinder and rotary tools. The burr shapes include ball, cone, cylinder, and more. This set is ideal for craftsmen, hobbyists, jewelers, modelers, repairers, and more. They are 1-3/4” long and made of GR-2 quality diamond. A clear plastic storage case, which is included, provides convenient organization and storage of your burrs for future use. CAUTION: Using power tools can be dangerous. Always take care and keep away from children. Wear protective eyewear in work area at all times. Select correct type and size of power tools for work. 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 of our SE Diamond Burr Set (20 PC.). IPR Rights Notice: Important: Avoid getting counterfeit items. Genuine SE products come with the SE logo on the packaging. SE is a registered trademark protected by US Trademark Law.