Include 43 pack diamond burr cutting set: 26 diamond burr bits, 4 diamond cutting wheels, 3 metal Mandrel and 10 impellers. | All burrs with a 1/8" shank is compatible with most dremel tool, rotary tools, WEN and die grinders. | Diamond burr bits have different shapes: ball, cone, cylinder, needle point and tapered with 3 kinds of size: 3*3, 3*6, 3*8. | The cutting wheels diameters are 20mm and 30mm, the impellers are 12mm and 15mm, the Mandrel Diameter is 3mm | Perfect for cutting gemstones, glass, porcelain, tiles, carbide, rocks, ceramics, aluminium and copper, great for crafts, hobbies, home repair, jewelry, lapidary use, modeling, and so much more. Assorted shapes and sizes to meet all your demand!