Our new current collectors make an optimal current supply on all common waggons (freight/passenger cars) possible and can be mounted very easily: Just glue the current collector onto the bottom of the vehicle body. The off-standing wheel contacts will now touch the back of the wheel (flange). Since every current collector has two steel sheets, one per axle will be enough. Appropriate for all axle distances, for OO DC and AC or N gauge. Set includes 8 current collectors which is sufficient for 8 axles.