... good edges holdout, 3.stronger flexibility than WA, 1.vitrified grinding wheel cover various specifications of vitrified abrasives with the diameter ... Diamond, friable, its girt is sharp, and Thermal conductivity4 Suitable for grinding Hard alloy, Optical glass, vitrify, gem, agate, honing cylinder ... order, shape, size, abrasive material, grain, grade, , and speed grinding wheel for woodworking tools