• Sharp, synthetic silicon carbide mineral cuts fast and smooth for long-lasting performance • Precut to fit most drywall sanding tools • Designed for sanding drywall joints, patching compounds, paint, and plaster • Packaging strong enough to use as storage container for unused sheets • patching compounds paint and plaster • Packaging strong enough to use as storage co • 4-3/16 x 11 - Storage Pack • Grit=100C