ZIRC Plus R801 PowerLock Cloth Discs-Type III, 1 1/2 in Dia., 50 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 TR/III fit roll-on/roll-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