50 Pack - 4.5" Zirconia Resin Fiber Disc 120 Grit 4-1/2" Grinding & Sanding Disc

4.5" Zirconia resin fibre discs by Black Hawk Abrasives feature top of the line Zirconia abrasive grains, resin bonded to a strong vulcanized fiber backing. These Zirconia resin fiber discs have a consistent sanding capability due to the zirconia grains ability to remain sharp throughout the life of the disc.