Flap discs have the advantages of grinding disc and fiber disc, make it easier for grinding and polishing of disposable, reduced the work process,reducing the grinding cost. Abrasive grain contain: Alumina oxide, calcine alumina and zircona, suitable for wood, glass, stone, stainless steel and various metal manufacturing industry, with the features of quick speed, high efficiency, synchronous consumption, strong grinding force, fast heat dissipation, good performance.