Remember when the surface of your wood had a nice and smooth finish. The WEN 60-Grit 3 x 21 in. Belt Sander Sandpaper Package includes 10-piece of high-quality sandpaper. This paper is designed to fit with the WEN 6321 3 x 21 in. Belt Sander, but also has a universal design to allow for compatibility with many other models of 3 x 21 in. belt/disc sanders. Remember when your sandpaper provided maximum performance on wood, metal, plastic and many other materials.