Diablo, 7 pack, 5'', general purpose, project pack disc, includes: (3) 60 grit, (2) 100 grit & (2) 150 grit discs, all the grits needed to complete your refinishing project, these universal, 12 hole random orbital sanding discs feature hook & lock backing & includes brea -through innovations that improve performance, extend sanding life & increase productivity, featuring premium ceramic blend, removes 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, provides longer life & extreme durability.