The Forney 72841 6-inch Industrial Pro twist knot wire wheel brush provide high-impact action. These premium wheels are used in surface preparation prior to welding and for removing weld scale, spatter and heavy corrosion. Used for heavy duty applications. Forney Industries is one of America's longest operating family-owned metal working product companies. Founded in 1932, Forney offers more than 5,000 products for the hardware, automotive, farm & ranch and do-it-yourself markets. If you've got metal working questions, we've got answers. We're committed to your success regardless of location size or needs. 6 inch (152.4 mm) x .032 inch (.81 mm) with 5/8 inch - 11 threaded arbor. Max 9,000 RPM. Claims for warranty must be made within 90 days of the date of purchase. Proof of purchase required. This warranty does not cover any product that has been subject to misuse, neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.