80Pc Professional Diamond Rotary Burr Burrs Drills Bits Carving Grinding 1/8" Shanks 40 120 240 Grits for Working with Ceramics, Stone, Glass, Tile, Wood, Plastic , Fiberglass ** GREAT GIFT IDEA ** Shank: 1/8 30 pieces Grit: 40 20 pieces Grit: 120-150 30 pieces Grit: 240 Assorted Shapes