Weiler® 17681 Wire Wheel Brush, Knotted, Standard Twist, Diameter: 3-1/4 Inch, Face Width: 3/8 Inch, Wire Size: 0.014 Inch, Trim Length: 5/8 Inch, No. of Knots: 20, Max. RPM: 25000, Shank Diameter: 1/4 Inch, Mounting: Stem, Filament Material: Steel