General description Great for cutting gemstones, glass, porcelain, tile, carbide, rock, ceramic, aluminum, and copper, this 43-piece stone carving set is ideal for crafts, hobbies, home repairs, jewelry making, gem use, modeling, and more. Technical specifications Includes: 26 diamond burr bits, 4 diamond cutting wheels, 10 impellers, 3 metal mandrels Shank diameter: 3 mm (1/8 in.) Cutting wheel diameters: 20 mm and 30 mm Impeller diameters: 12 mm and 15 mm Mandrel diameter: 3 mm Color: as shown Material: diamond Measurement allowed error: +/- 1-3 cm Compatibility and accessories Compatible with most rotary tools or die grinders