3M Cubitron II Roloc Fibre Disc, 33392, 80+, 3 in (7.5 cm) 3M?s Cubitron II Roloc Fibre Discs 786C is an abrasive disc featuring 3M Precision Shaped Grain resin-bonded to a stiff fiber backingThis disc with its tough hard sharp ceramic abrasive lasts significantly longer than conventional ceramic grain discs, making it ideal for grinding, weld blending, deburring and similar tough metal finishing jobs. Product Information Brand 3M Part # 7100033192 Line Cubitron II Color Purple Diameter 3 Inch Grit 80+ Origin Country USA Product Type Quickchange Discs Product InformationCubitron II cuts faster and lasts longer than conventional ceramic abrasivesGrains are electrostatically oriented on abrasive surface for efficient cut, even wearPSG self-fractures during use to maintain sharpness and prolong abrasive lifePrecision Shaped Grain (PSG) technology employs microreplication for extremely uniform abrasiveSignificantly longer lasting, complete more parts per disc and requires fewer disc changesStiff fiber backing and a strong resin bond lend this disc long life and tear-resistanceTriangular PSG abrasive grains are super-sharp and cut exceptionally fast