PFERD Universal Line PS-FORTE Bench and Pedestal Grinding Wheel, Flat, 7 in Wheel Diameter, 1 in Wheel Thickness, 1 in Center Hole, 36 Grit, Aluminum Oxide Abrasive, 3600 rpm Maximum, Vitrified Bond, Applicable Materials: Steel and All Ferrous Metals, Wheel Type Number: Type 1