20pc Diamond Tip Grinding Bit Burr Set 3/32 Inch Shank - Unique Shapes - Fits Dremel Quality accessory for Dremel-type rotary tools, 3/32 in. shank size favored by professional jewelers Each bit unique shape and style for filing, drilling, engraving, carving, cutting & material removal High speed steel shanks with heads embedded with 180 grit industrial diamond particles Hardest abrasive material available, effective on glass, tile, stone - even hardened steel Compact storage case keeps bits from being damaged, easy to identify; see description for bit list