... , 3.stronger flexibility than WA, 1.vitrified grinding wheel cover various specifications of vitrified abrasives with the ... friable, its girt is sharp, and Thermal conductivity4 Suitable for grinding Hard alloy, Optical glass, vitrify, gem, agate, ... problem7.Wheel should be written according to the order, shape, size, abrasive material, grain, grade, , and speed grinding wheel for woodworking tools