Chris Marshall explains how 3M’s Cubitron II sanding discs bring industrial strength sanding to your home workshop. Premium 3M Xtract Cubitron II Sanding Discs feature a hard ceramic that behaves like carbide—when the grains break, they expose a new sharp edge, resulting in incredibly fast sanding, and exceptionally long-lasting performance. The abrasive is layered on 3M’s Xtract net backing that provides virtually dust-free sanding, regardless of the hole-pattern on your sander.