CGW Coated Abrasive Flap Disc, Contaminant-Free Premium Regular, 4-1/2 in Disc Dia, 5/8-11 Center Hole Thread Size, 36 Grit, Medium Grade, A3 Aluminum Oxide Abrasive, Type 29 Conical Disc, Heat Treated Polyester Backing, 13300 rpm Maximum, White