Gator Grit 25 Count 9" x 11" 36 Grit Extra Coarse Multi-Surface Sandpaper. These multi-surface sandpapers are ideal for use on wood, metal, drywall, fiberglass or painted surfaces. The sheets can be used for hand or machine sanding. They can be cut into 1/2 sheet, 1/3 sheet, or 1/4 sheet to fit orbital sanders.