Diablo's premium 5 in. 80-Grit universal, 12-hole Random Orbital Sanding (ROS) discs with Hook and Lock backing includes break-through innovations that improve performance, extend sanding life and increase productivity. Featuring a premium ceramic blend, these discs remove material faster than other sanding discs and offer an extra long sanding life. Clog-SHIELD, Diablo's own blend of grinding agents, reduces loading thus maximizing productivity. The superior Grit-to-backing bond, ENDURA-BOND, provides Diablo's sanding discs with longer life and extreme durability.