Made by using powder metallurgy tech and high temperatrue agglutination to fix diamond on a shank body of certain specil-fication. Dressing use broken diamond made it hard to break off. Impurity and the gas froth part is hard to lost when participating in dressing, so it is a low-price grinding wheel dress tool. According to the difference in arrangement and structure, here forms many different specification, so as to fit the grinding wheel dressing of different grinders. L series: diamond distributed in chain shape; C series: diamond distributed in layer shape; P series: diamond distributed in line shape; F series: diamond distributed in powder shape.