High Performance Type 27 Flap Discs, 4 1/2 in, 40 Grit, 5/8 Arbor, 13,300 rpm

Features: Premium abrasive cloth provides up to 15X longer life than fiber resin metal sanding discs | Zirconia grit enables 3X faster material removal than fiber resin metal sanding discs | Type 27 fiberglass backing provides grinding angle of 5-15 degrees