ZIRC Plus R801 PowerLock Cloth Discs-Type I, 4 in Dia., 60 Grit

Features: Self-sharpening, zirconia alumina abrasive with grinding aid provides cooler cut, longer life on hard to grind materials | Durable, Y-weight, 2-ply polyester backing stands up to demanding applications | Type TP/I fit snap-on/snap-off plastic attachment system | All QC cloth discs are designed to run on back-up pads that are rated at or above the RPM of the grinder