Zenith Industries ZN306021 Stainless Steel Twist Knot End Brush, 1" x .02" x 1/4" Twist knot design offers increased aggression for tough applications and resists flaring and wire loss Removes rust, mill scale, weld slag and paint on stainless steel and aluminum Great for heavy-duty quick cleaning and surface prep of stainless steel and aluminum Max RPM 20,000 Always wear eye protection