eBoTrade 10 Pieces Tungsten Carbide Rotary Burr SET 1/8" Shank/double Cut Carbide Rotary Burr Set with 3mm Shank/tungsten Carbide Single Cut Rotary Burr SET 1/8" Shank Fit Dremel Tungsten Carbide Double Cut Rotary Burr SET 1/8" shank Fit Dremel; Shank diameter: 3mm, Shank Length: 35mm, Cutting edge diameter: 6 mm; Material: Tungsten | Carbide Use: Rotary Burr, High micro hardness,high abrasion resistance,good toughness; High performance on processing Copper, Aluminum, Alloy, Iron, Marble, Jade, Steel, Glass, Wood and Plaster etc. Highly recommended for polishing metals and plastics, jewelers, lapidary use, hobbies, crafts, craft modeling, home repair and so much more.