Lincoln Electric high impact stainless steel twisted stringer bead brush for stringer bead cleaning, pipe fabrication, brushing expansion joints, and narrow grooves. It is used to reduce discoloration and corrosion on stainless and aluminum alloys. High concentration of knots, precision balanced, and rugged construction. Arbor adapter and threads to fit most grinders and allows you to change the arbor size of the brush. Stainless steel wire brushes are highly corrosion resistant and should be used where contamination or after rust is a problem. 0.020-inches wire size. 5/8-inches x 11 UNC arbor hole. 3/16-inches face width. 20000 rpm maximum speed. 4-inches brush diameter.