The 1A-X portable sander belt has a semi-friable aluminum oxide grain and x-weight cotton backing. Belts are for general purpose sanding, finishing, and grinding. Used for ferrous and non-ferrous metals, cast iron, stainless steel, high-tensile alloys, aluminum, and soft or hard woods. Blue Line packaging. Package of 10. *Note: 20% restock fee on all SAIT/United Abrasives returns.