Diablo's premium sanding sheets include break-through innovations that improve performance, extend sanding life and increase productivity. Featuring a premium aluminum oxide 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. These sanding sheets are ideal for hand sanding or orbital sanders. Includes (4) 80 Grit/Coarse discs for leveling and heavy stock or paint removal, (3) 120 Grit/Medium sheets for moderate stock removal and sanding preparation before paint, (3) 220 Grit/Ultra Fine sheets for intercoat sanding of stain/varnish.