... grinding wheel 1. Sharp cutting, 2. good edges holdout, 3.durable, 4.stronger flexibility than WA, 1.carborundum grinding wheel cover ... and to tackle a key problem7.Wheel should be written according to the order, shape, size, abrasive material, grain, grade, , ... steel, High-carbon steel,Chromium corundumPAPink,rose-red Sharp cutting, good edges holdout, durableSuitable for form grinding, knives, ...