... harder than Boron carbide and Diamond, friable, its girt is sharp, and Thermal conductivity4 Suitable for grinding Hard alloy, Optical glass ... , High-speed steel, High-carbon steel,Chromium corundumPAPink,rose-red Sharp cutting, good edges holdout, durableSuitable for form grinding, knives, ... metallic and Nonmetallic material, i.e. Leather cutting/splitting/skiving Machine Accessories-Grinding Wheel