Forney 72759 Wire Wheel Brush, Twist Knot with 5/8-Inch-11 Threaded Arbor, 4-Inch-by-.020-Inch 4, Twist knot, wire wheel brush, coarse, arbor 5/8-11, wire size Adds a great value Manufactured in China Twist knot wire wheel brushes provide high impact These wheels are used in surface preparation prior to welding Also great for removing weld scale, spatter and heavy corrosion Used for heavy duty cleaning applications