... , 2High-speed steel, High-carbon steel 1.silicon carbide fiber disc, has good flexibility, high Intensity ... glass, vitrify, gem, agate, honing cylinder sleeve and other hard friable materials.4.Please mark ... durableSuitable for form grinding, knives, Measuring instrumentGreen silicon carbideGCgreenOnly no harder than Boron carbideSuitable for grinding ... , i.e. single alundum silicon carbide fiber disc