Diablo, 2 pack, 3 x 21 120 grit sanding belt Sanding belts include breakthrough 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 ClogShield, Diablo’s own blend of grinding agents, reduces loading thus maximizing productivity The superior grain bonding system, EnduraBond, provides Diablo’s belts with longer life and extreme durability