Rotary Burr Set, 10Pcs Tungsten Carbide Steel Rotary File Grinding Head Milling Cutting Files Tools with Storage Box for Engraving on (Double Cut): Features: 3mm Round ShankThe 3mm round shank would fit many electric or pneumatic tools. 10PCS A SetThere are total 10 pieces burrs in different shapes that you can use for multiple purposes. Tungsten Carbide Steel MaterialThese burrs are made of tungsten carbide steel for high hardness and high abrasion resistance. Widely ApplicableWidely used for carving, shaping and for removing sharp edges or corners, burrs and excess material. VersatileCould cut cast iron, cast steel, carbon steel, alloy steel, stainless steel, copper, aluminum, marble, jade, bone, etc. Product Information: Material: Carbide, Alloy Steel, Tungsten Finish Type: Aluminum Package Includes: 10 * Rotary Burr Set Note: The size is measured by hand, so there may be an error of 0.5 inches, please note that our product pictures are taken in kind.