Diablo's premium 7-piece refinishing project pack includes all grits needed to complete your refinishing project: three 80-Grit, two 150-Grit and two 220-Grit discs. These universal, 12-hole random orbital sanding (ROS) discs feature Hook and Lock backing and includes break-through innovations that improve performance, extend standing 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.