ZFE 90 Pcs Diamond Burr Bits Drill Glass Gemstone Metal for Dremel Craftsman Rotary Tool-3/32" (2.35mm) Shank Excellent for fine detail work, cutting, engraving, carving, touch-up and finishing Work on glass, metal , stone, ceramic, wood, plastic Total 90 Pieces and come in convenient plastic box All burrs with a diameter 3/32"(2.35mm) shank - compatible with most die grinders or rotary tools Highly recommended for jewelers, lapidary use, hobbies, crafts, craft modeling, home repair and so much more