Compatible with Festool DX 93 E sanders. Festool's Rubin abrasive incorporates a special closed-coated aluminum oxide that sheds wood fibers, making it an excellent choice for natural wood, wood composites and veneers. Where rapid material removal is the goal, use grits ranging from P24 to P60 for rough surface finishes or to prep for higher grits. For more intermediate sanding, use grits P80 to P120 to quickly and efficiently reach a good surface finish. Use Rubin P150 to P180 for finish sanding on softer woods. All Festool abrasives are engineered and manufactured to strict FEPA standards, guaranteeing uniform abrasive positioning and consistent sanding results.