The CA-BELT-AL 3 X 21 100G PK10 is a pack of aluminum oxide sanding belts designed for efficient sanding and finishing. Each belt measures 3 inches by 21 inches and features a 100-grit finish, making them ideal for smoothing surfaces and removing material. These belts are compatible with standard belt sanders and are perfect for use on wood, metal, and plastic. The aluminum oxide material provides excellent durability and longevity, ensuring consistent performance. This pack of 10 belts is perfect for both professional and DIY projects.