Cartridge rolls quickly remove material, smooth surface imperfections, and ease sharp edges. The long, narrow straight or tapered form reaches into corners and inside edges, contours, and channels where larger tools don't fit. Rolls are made of wrapped abrasive that exposes fresh abrasive as layers are worn away. They require a compatible mandrel to install on a rotary tool or die grinder. The flexible, tear-resistant cloth backing conforms to contours and is more durable and tear resistant than paper.