Key Features;P-graded aluminum oxide abrasive provides increased life fast cut rate consistent finish;Water-based stearate no-fil coating open coat and vacuum holes minimize loading and maximize dust collection and life;Unique fiber reinforced backing is edge tear-resistant;Good choice and value for coarse grit dry stripping blending and sanding aluminum fiberglass composites hardwoods and softwoods;Hook-and-loop back for easy disc mounting and changing;Sanding discs hook & loop p-grade aluminum oxide 5 inches diameter - 8 hole - handy packs grit=p60 Premium P-graded aluminum oxide abrasive. Heavy duty backing. Waterbase zinc stearate open coat. Last 3X longer than conventional aluminum oxide. Consistent finish. Superior cut rate. Edge tear resistant. Reduced loading. No finish contamination. Quick and easy disc change. Allows for repeated use until disc is worn out. Fits random orbital disc sanders.