The carbide rotary burrs, double cut head, quick cuts. It is easy to use, suitable for processing these metal and non-metal. Features: High hardness, can process a variety of metal and non-metal. In a part of the work, it can replace the petiole small wheel, and no dust pollution. High production efficiency, the processing efficiency is several times higher than file. Easy to use, can reduce labor intensity, improve the working environment. Suitable for processing these metal and non-metal, such as cast iron, cast steel, bearing steel, high carbon steel, chrome-nickel alloy, bronze, brass, and ceramic tile, marble, jade, bone, etc. Specifications: Material: Tungsten Carbide Color: Silver Diameter: 7/16" Length of Flute: 1" Overall Length: 2 3/4" Package Weight: 37g / 1.31ounces Package Size: 70 * 12 * 12mm / 2.76 * 0.47 * 0.47in Packing List: 1 * Carbide Rotary Burrs