12 New Diamond Coated Ball Burs * This is a new set of 12 diamond coated ball burs * This master diamond bur set allows you to shape, grind and finish with precision * 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 and crafts, modeling, home repair, etc * Provides uniform cutting on wide a variety of materials * Use water for lubricant * All have a 1/8" (3 mm) shank