... 1. Sharp cutting, 2. good edges holdout, 3.stronger flexibility than WA,1.vitrified grinding wheel cover various specifications of vitrified ... ZrO increases.3. Only no harder than Boron carbide and Diamond, friable, its girt is sharp, and Thermal conductivity4 ... speed steel, High-carbon steel,Chromium corundumPAPink,rose-red Sharp cutting, good edges holdout, durableSuitable for form grinding, knives, ...