> This product is intended for jewelry, home crafts and artworks for cutting, engraving, grinding and polishing metal, glass, stone and plastic. > Recommended for jewerly, lapidary use, hobbies, crafts, craft modeling, home repair and so much more. > Great for cutting, engraving and grinding glass, tile, stone, ceramics, plastics, metals, and anything with a hard surface. > They are suitable for polishing metals, stones and plastics. Can be used with most hand engraving power tools. > Assorted shapes and sizes include: ball, cone, rounded cylinder, flat top cylinder, tapered. Specifications: 30 pcs. diamond burrs Diamond bur shank diameter: 1.6mm/0.06 in Frame material: Aluminum Alloy Size: approx 8*3.5*2.5cm/3.15x1.38x0.98 in.
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