PFERD 82186 Wire Wheel Brush, Knotted, Stringer Bead Twist, Diameter: 4 Inch, Face Width: 3/16 Inch, Wire Size: 0.02 Inch, Trim Length: 3/4 Inch, No. of Knots: 32, Arbor Size: 5/8-11 UNC, Max. RPM: 20000, Mounting: Threaded, Filament Material: Carbon Steel