Shopsmith 6 x 48 Inch Aluminum Oxide Sanding Belts are the best on the market. Shopsmith sanding belts are made with a durable, open coat Aluminum Oxide material that is both fast-cutting and resistant to loading for longer life. Shopsmith 6 x 48 Inch Belt Sander Belts feature a unique industrial-grade backing that provides long-lasting performance and durability. Assorted Pack Includes: (3) 6" x 48" Aluminum Oxide Sanding Belts (1-Each: 150 Grit, 220 Grit, and 320 Grit)