Description 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.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 WheelsEasy to useThe product is manufactured in ChinaHigh 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 safetyProduct Dimensions: 4"L x 4"W WARNING: This product can expose you to chemicals including Lead which is known to the State of California to cause cancer, birth defects or reproductive harm and Butyl Benzyl phthalate (BBP) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov