90 PCS DIAMOND BURS Great for fine detail work, cutting, engraving, carving, retouching and finishing, working on glass, metal, stone, ceramic, wood, plastic< /p> 30 bits of different styles burrs can achieve more carving, great for all kinds of detail work in glass, metal, stone, ceramic, wood, plastic Jewelry, Beach Glass, Shells, Gemstones, Stone Cutting, Necklaces, Earrings, Pendants, Bracelets, Beach, Tiles, Marble, Stones, Ceramic, Porcelain, Drills, Coated Burrs 1/8 inch diameter shank, compatible with most rotary tools, great for DIY, hobby, craft and anytime you need to polish, grind, drill, cut, engrave and more with most rotary tools Material: Alloy; Diameter: 3mm / 0.12 inch Product Description Very popular drill hole tools used by jewelry designers to drill holes in beach sea glass, stones, rocks for making necklaces, earrings, pendants, etc. and bracelets. Features: Quantity: 90pcs diamond burrs 1/8 inch (3mm) shank The total length is 1.77 inch Packing in plastic box,