The Forney 72749 6-Inch Twist Knot Wire Wheel Brush provides high-impact. These wheels are used in surface preparation prior to welding and for removing weld scale, spatter and heavy corrosion. Used for heavy duty cleaning applications. Forney Industries is one of Americas longest operating family-owned metal working product companies. Founded in 1932, Forney offers more than 5,000 products for the hardware, automotive, farm and ranch and do-it-yourself markets. 6-Inch (152.4-mm) by0.020-Inch (0.305-mm) with 1/2-Inch - 5/8-Inch (12.7-mm - 15.88-mm) arbor sizes. Max 9,000-RPM. Proof of purchase required. neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.