PFERD threaded knot power wire wheel brushes. Full cable twist knotted wire is efficient for weld spatter removal, blending tool marks, cleaning and deburring, and removal of encrustations. Used in pipe joining for cleaning scale and spatter following welding. Low-flex, high-impact cleaning. Narrow face allows better control of surface contact area. Full cable twist is ideal for the toughest brushing applications where surface finish is a low priority. Superior rotational balance reduces operator fatigue and improves tool life. Recommendation for optimal performance, use on angle grinders. 1-1/4-inches trim length. 1/2-inches face width. 5/8"-11 thread size. 30 knots. Uses in industries area: automotive, transportation, mining, electronics, aerospace, welding, nuclear, textiles, food services, construction, petrochemical, farming, medical, shipbuilding, fabricating, defense, foundries and plastics.