Scotch-Brite Clean & Strip XT Disc 07471, 4" x 1/4", 4 discs/bag. Clean paint and rust from hard to reach areas. Extra coarse for faster cutting. Stronger, tougher and longer lasting than the original discs. Use with the 3M(TM) Wheel Mandrel 07491. Do not exceed 8500 RPM. Safer than wire wheels and will not rust.