The RYOBI File Sander Belts are compatible with the RYOBI 18V ONE+ Cordless _" x 18" Belt Sander. The aluminum oxide blend provides longer life and increased durability. This 3-Pack package comes with a 60 grit, 80 grit, and 120 grit file sander belt, for a variety of applications. For best use with wood, metal, and plastic.