... holdout, 3.stronger flexibility than WA, 1.vitrified grinding wheel cover various specifications of vitrified abrasives with the diameter less ... friable materials.5. Please mark in detail(such as max speed, port, special bond and so on), when the ... key problem7.Wheel should be written according to the order, shape, size, abrasive material, grain, grade, , and speed grinding wheel for woodworking ...