Aluminum Oxide - An all purpose sandpaper that is ideal for all surfaces. The resin bonded aluminum oxide is very tough, durable, and sharp. Use the coarser grits (80 grit & under) for heavy removal of wood, finishes and other coatings. Medium and fine grits (100 to 180 grit) work best for moderate removal of imperfections and final sanding or cleaning of wood. Use 220 grit for extra smooth bare wood surfaces, and light for light sanding between staining and sealing applications. 9" x 11" Norton sandpaper. 25 sheets/pack. Canada