Aluminum Oxide Sanding Belts A/O. Aluminum Oxide Sanding Belts are resin bonded, and have tear and break resistant joints. These abrasive sanding belts are excellent on all metals and hard woods. Aluminum Oxide YWt Sanding Belts are open coat poly/cotton material that has a specially coated backing providing high performance for washable belts. The high rigidity retention resists softening ...