Features: Titanium Coated Includes 30 assorted shapes Covered with diamond particles All bits have 1/8" shanks and come in convenient plastic holder 180 grit Excellent for carving, cutting, engraving, finishing, touching up, and working on fine details Description: For etching, fast cutting, filing, grinding, sanding, and shaping with detail and precision. Use on brick, ceramics, fiberglass, glass, gold, hardened steel, marble, metal, plastic, platinum, rock carbuye, silver, stone, tile, wood, fiberglass, and any solid surface. 1/8" shank diameter size, which allows them to be compatible with most die grinder and rotary tools. Include ball, cone, cylinder, and more. This set is ideal for craftsmen, hobbyists, jewelers, modelers, repairers, and more. 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. Packing List: 30Pcs/Kit Burr Bits Drill