Quick u0026amp; easy way to reduce layout maintenancenRemove dirt u0026amp; grime while you run your trainsnReplaceable spring-loaded custom Bright Boy abrasive padnColorful paint u0026amp; letteringnRP-25 metal wheelsnMolded detailsnRealistic paint schemesnKeep your train set or layout's rails clean and shiny with this car! Simply run it as part of your train and the spring loaded Bright Boy soft abrasive pad will polish your rails for electrical reliability. This car features free-rolling wheels with RP25 contour, strong metal axles and magnetic knuckle couplers.