Norton, 4 Pack, 120 Grit, 1/4, Clamp On Sheet, Premium, Sanding Sheet, For Use On 1/4 Sheet Palm Sanders, For Use On Wood, Metal, Fiberglass & Painted Surfaces, Premium Ceramic Grains Sands Cooler, Cuts Faster & Lasts Longer, Up To 5 Times Longer Than Traditional Sanding Discs, Anti-Clog Stearate Coating Reduces Particle Build Up, Keeping The High Performance Grain Exposed Longer.