Diablo, 15 Pack, 5'', 150 Grit, Hook & Loop, Sanding Disc, Universal Random Orbital With Hook & Lock Backing, Extend Sanding Life, Increase Productivity, Premium Ceramic Blend, Remove Material Faster Than Other Sanding Discs, Extra Long Sanding Life, Clog Shield Own Blend Of Grinding Agents, Reduces Loading & Maximizing Productivity, Superior Grain Bonding System, Endura Bond, Provides Longer Life & Extreme Durability.