Tungsten carbide rotary burrs for use with high-speed electric grinders or pneumatic tools. Carbide rotary files are widely used in machinery, automobiles, ships, chemicals, craft carving and other industrial sectors. Carbide rotary files can be used to process cast iron, cast steel, carbon steel, alloy steel, stainless steel, hardened steel, copper and aluminum. Since the carbide rotary file is clamped on a high-speed rotating tool for manual control, the pressure and feed speed of the carbide rotary file are determined by the service life and cutting effect of the tool.