... , fibre glass reinforced , quality is good . 10years export . Depressed center grinding wheel for General Metal , 6mm-7.2mm, 80max rate , fibre glass ... wheel life .This kind of cut off wheel is suitable for metal including steel and iron . Perfectly protect the workers from ... .0x16mm , 115x6.2x22mm , 125x6.0x22mmMax Rate : 80 M/S Depressed center grinding wheel for Metal