The Lessmann DIY Wheel Brushes are fitted with a 6mm shank and are generally used for the removal of rust, paint or dirt and for roughening, de-burring, stripping or polishing. Available in Steel or Brass. The Lessmann DIY Wheel Brush has the following specification Wire Type Brass. Diameter 75mm. Width 8-10mm. Wire Gauge 0.25. Shank 6mm. Max Speed 4,500/rpm.