DEWALT DWA4510 Metal Grinding Wheel, 4-Inch x 1/8-Inch x 5/8-Inch The product is 4" x 1/8" x 5/8", Metal Grinding Wheel, Aluminum Oxide Grain, High Grain Concentration For Aggressive Grinding Action & Smoother Running Wheels, Easy to use The product is manufactured in China High performance aluminum oxide grain for long life and high material removal High grain concentration for Agressive grinding action and smoother running wheels 3 full sheets of fiberglass for durability and safety