Abrasive Disc; 3 Inch Diameter; 36 Grit; 3M Cubitron II Roloc Fibre Discs are engineered to cut faster, cooler and with less grinding pressure than conventional abrasives. Plus they can last up to 5 times longer, for increased productivity!03M Precision-Shaped Grain (PSG) maintains super-sharp points that cut exceptionally fast with less pressure Disc life is significantly longer, completing more vehicle parts per disc and requiring fewer disc changes Triangular-shaped ceramic grain wears evenly, runs cool, and optimizes mineral breakdown