This 2-3/4-inch knot cup wheel is designed to remove rust, scale, paint, burrs, and corrosion, and to clean and prepare large metal surfaces. Its industrial-grade construction and high-tensile-strength wire resist breakage for durable, long-lasting use. The wheel has a 5/8"-11 arbor bore and a maximum operating speed of 12,500 RPM. **Warning:** This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.