3M Sandblaster, 3 Pack, 5", 8-Hole 120 Grit Sanding Disc, Use On 5" Random Orbital Sanders Only, Use On Many Surfaces, Including Wood, Metal, & Fiberglass, Will Not Discolor Your Sanding Surface, Press Disc Firmly With A Slight Twisting Motion, Backing Is Coated With Extremely Durable Cubitron Mineral, Stays Sharp, Resulting In A More Consistent Sanded Surface & Longer Disc Life, Cuts 3 Times Faster & Lasts 3 Times Longer, Resists Tearing, Clog Resistant For Less Work.