... , 3.stronger flexibility than WA, 1.vitrified grinding wheel cover various specifications of vitrified abrasives with the diameter ... gem, agate, honing cylinder sleeve and other hard friable materials.5. Please mark in detail(such as max speed, port, ... problem7.Wheel should be written according to the order, shape, size, abrasive material, grain, grade, , and speed grinding wheel for woodworking ...