carborundum grinding wheel 1. Sharp cutting, 2. good edges holdout, 3.durable, 4.stronger flexibility than WA, 1.carborundum grinding wheel cover various ... ZrO increases.3. Only no harder than Boron carbide and Diamond, friable, its girt is sharp, and Thermal conductivity4 Suitable ... gem, agate, honing cylinder sleeve and other hard friable materials.5. Please mark in detail(such as max speed, port, ...