... makes its cutting efficiency higher, working life longer, cost lower and performance higher. Diameterlengthshank16mm40mmG1/2''25mm50mmG1/2''50mm50mmG1/2''75mm50mmG1 ... be more sharp,what’s more,the grinding force and the grinding temperature will be apparently decreased.3, Enough ... 5, Cutting granits,concrets,rebars,ceramics,glass,woods,plastics and so on,which is highly efficient.6, Strong structure ...