Diamond Burs 80 Grit 1/8" Shank 30pc Set This is a new set of 30 assorted diamond coated burs These are 80 grit 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