IVY Classic 38901 3-Inch x 5/8-Inch-11 Arbor, Stainless Steel Knot Wire Cup Brush - 0.020-Inch Coarse, 1/Card For heavy duty removing of rust, dirt, scale, paint or welds from flat surfaces Precision balanced to eliminate vibration, threaded arbor for use on angle grinder Corrosion resistant stainless steel construction does not leave deposits that cause rust on stainless steel, aluminum and other non ferrous metals Wire Trim Length: 7/8-inch, Wire Diameter: 0.020-inch Brush Diameter: 3-inch, Arbor: 5/8-inch - 11, Max RPM: 12,500