Diablo, 15 pack, 5 PSA assorted sanding discs Diablo’s premium 5, 12hole random orbital sanding discs with hook lock backing include breakthrough 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 ClogShield, Diablo’s own blend of grinding agents, reduces loading thus maximizing productivity The superior grain bonding system, EnduraBond, provides Diablo’s sanding discs with longer life and extreme durability