With the power on, the wheels will revolve, enabling the dirt on the tyres to be removed by applying gentle pressure first with the scraper and then switching to the brush to finish.
Peco PL42 Wheel Cleaning Brush
Peco PL42 PL42 Wheel Cleaning Brush
Wheel Cleaning Brush Peco PL42
Peco PL-42 Wheel Cleaning Brush