3M Xtract Cubitron II Net Discs (710W): 5 in. Width (Purple) / 50-Discs 220 grit
The triangular-shaped ceramic mineral is designed to slice through the substrate, rather than gouging or "plowing" like conventional abrasives, resulting in a disc that cuts up to 2x as fast and lasts up to 6x as long as conventional abrasives.