Diablo, 7 pack, 5'', refinishing project pack disc, includes: (3) 80-grit, (2) 150-grit & (2) 220-grit discs, all grits needed to complete your refinishing project, these universal, 12 hole random orbital sanding discs feature hook & lock backing & includes break through innovations that improve performance, extend sanding life & increase productivity, featuring premium ceramic blend, remove material faster than other sanding discs & offer an extra long sanding life, clog shield, blend of grinding agents, reduces loading & maximizing productivity, superior grit-to-backing bond, endura-bond, longer life & extreme durability.