The Forney 70501 Replacement Carbon Steel Wire Brush is for Forney 70500 chipping hammer. Sturdy, high quality, carbon steel wire brush set in hardwood with hang hole. 4 3/4-Inch (120. 65mm) overall length by 7/8-Inch (22. 22mm) block by . 014-Inch (. 36mm) carbon steel wire in 3 by 15 rows. Forney Industries is one of America's longest operating family-owned metal working product companies.