Flat Depressed Center Wheel, 4-1/2 in Dia x 1/4 in THK, 30 Grit, Aluminum Oxide Abrasive
CGW Depressed Center Wheel, Flat, 4-1/2 in Wheel Diameter, 1/4 in Wheel Thickness, Arbor Connector, 30 Grit, Medium Grade, Aluminum Oxide Abrasive, Wheel Type Number: Type 27, 13300 rpm Maximum, Resin Bond, Applicable Materials: Aluminum, Copper, Soft Metal and Zinc, 5/8-11 Center Hole Thread Size, Wheel Hardness: N, Black Wheel.