Norton , 15 Pack, 5″, 150 Grit, 8 Hole, Premium Hook & Loop, Ceramic Sanding Discs, For Use On 5″ Random Orbit 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.