Pferd universal line PS-Forte bench and pedestal grinding wheel, flat, series: universal line PS-Forte, 6 in wheel dia, 1/2 in wheel thickness, 1 in center hole, 60 grit, coarse grade, aluminum oxide abrasive, 4,140 RPM maximum, vitrified bond, applicable materials: steel and all ferrous metals, wheel type number: type 1. Pferd 61736 Universal Line PS-Forte Flat Bench and Pedestal Grinding Wheel, 6 in dia x 1/2 in thick