Norton , 15 Pack, 5", 150 Grit, 8 Hole, Premium Hook and Loop, Ceramic Sanding Discs, For Use On 5" Random Orbit Sanders, For Use On Wood, Metal, Fiberglass and Painted Surfaces, Premium Ceramic Grains Sands Cooler, Cuts Faster and 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.