Radiac® Snagging Cup, Type 11, 6 in Maximum Dia, 2 in Head Length, 5/8-11 Center Hole, 16 Grit, Coarse Grade, Silicon Carbide Abrasive, 6050 rpm Maximum, Resin Bond, Applicable Materials: Non-Ferrous Metals, Aluminum, Brass, Bronze Castings, Glass, Rubber and Stone