... heat 5.tool parts 1.abrasive tools, tool partsshould be written according to the order, shape, size, abrasive material, grain, grade, , and speed.2 ... .Suitable for the work pieces made of materials Chilled steel, 3.High-speed ... weaker flexibility than A. Suitable for the work pieces made of materials Chilled steel, High-speed steel, High-carbon steel, ...