3M™ Cubitron™ II abrasive fiber discs is built for faster cutting of welds as well as grinding, weld blending, deburring and other tough metal finishing jobs. 3M™ precision shaped grain - a tough, sharp ceramic abrasive - is resin bonded to a stiff fiber backing. This disc lasts significantly longer than conventional ceramic grain discs, delivering a lower cost per grind with fewer disc changes.