Diablo, 15 pack, Diablo's premium 6" 320 grit (super fine) random orbital sanding discs with stickfast backing. Sanding discs include break-through 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. 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.