The Grainger 14R989 is a 14-inch diameter, stainless steel wire wheel brush with twisted knot wire. It has a 5/8-inch arbor hole and is rated for maximum RPM of 15,000. The brush has a radial crimped wire fill and is designed for aggressive surface cleaning and deburring applications. This wire wheel brush can be used on metals including steel, aluminum, brass and more. It works on bench grinders, die grinders and other rotary power tools. The 14R989 should be used with eye protection and care should be taken not to overheat surfaces during use. This is an industrial-grade stainless steel wire wheel brush sold by Grainger.