Diablo's 4 x 24 in, 120 grit sanding belts include break-through innovations that improve performance, extend sanding life and increase productivity. Featuring a premium zirconium blend, these belts remove material faster than other sanding belts 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 belts with longer life and extreme durability.