Diablo, 12 pack of 3-3/4" oscillating detail triangle sanding sheet assorted pack consists of 4 each 80 grit (coarse), 120 grit (fine) and 220 grit (ultra fine) sheets. Diablo's premium detail triangle sanding sheets with hook and lock backing include break-through innovations that improve performance, extend sanding life and increase productivity. Featuring a premium ceramic blend, these discs remove material faster and offer extra-long sanding life than other sanding discs. Clog-shield, Diablo's own blend of grinding agents, reduces loading thus maximizing productivity. The superior grain bonding system, Endura-Bond, provides Diablo's sanding discs with longer life and extreme durability.