The Pearl Classic Aluminum Oxide Maxidisc features an extremely tough Aluminum Oxide abrasive grain. This AL/OX Grain is very tough and is excellent for stock removal. The Pearl Classic T-27 Flap Disc is excellent for paint removal, blending/finishing, weld bead removal, surface preparation, deburring, grinding and polishing. These flap discs feature a 50-50 blend of polyester and cotton for the backing, making these flap discs highly flexible compared to regular flap discs. Call Panther Industrial today to try these top of the line Pearl Classic Maxidiscs!