Our top-quality Shopsmith 9 x 11 Inch Sanding Sheets are made with a durable, open coat Aluminum Oxide material that is both fast-cutting and resistant to loading for longer life. Shopsmith Sanding Sheets are versatile for a variety of finishing tasks and feature a unique industrial-grade backing that provides long-lasting performance while still maintaining the flexibility necessary to sand even the finest of details to perfection. Includes: (6) 9" x 11" 320 Grit Aluminum Oxide Sanding Sheets