Carbide alloy rotary file (also named tungsten steel wheelhead): This product, instead of grinding wheel bur with handle, can cut and process all kind of metal and nonmetal materials under hrc70, and its service life is longer than 300 pieces of grinding wheel bur with handle. It can be used in rag, burr and welding seam of processing, cleaning, casting, forging and welding the moulds, in abrasive finishing process of internal cavity of impeller channel valve, in rounding and groove process of all kinds of machinery parts, and in technical carving all metal and nonmetal materials.