CGW Toolroom Wheel, 5 in Wheel Dia, 1-3/4 in Wheel Thickness, 1-1/4 in Center Hole, 46, Grade: Medium, Aluminum Oxide Abrasive, Wheel Type Number: Type 11, 5348 rpm Maximum, I Wheel Hardness, Vitrified Bond, Applicable Materials: High Alloy Steel, Pink Wheel, Cup Wheel Shape.