Serious Grit 225mm 9-hole 220 Grit sanding discs are engineered for drywall pros using Festool Planex sanders. These discs feature a heavy-duty film backing that resists tearing and supports wet or dry use. The durable aluminum oxide abrasive delivers consistent cutting power, while a heat-treated zinc stearate coating minimizes clogging. The precision multi-hole pattern ensures excellent dust extraction for a cleaner, more efficient sanding experience.