DEWALT DWA4511H 11 Metal Grinding Wheel, 4-1/2-Inchx 1/8-Inchx 5/8-Inch Reviewhttp://tinyurl.com/o8ou4wc DEWALT DWA4511H 11 Metal Grinding Wheel, 4-1/2-Inchx 1/8-Inchx 5/8-Inch High performance aluminum oxide grain for long life and high material removalHigh grain concentration for Agressive grinding action and smoother running wheels3 full sheets of fiberglass for durability and safety