The rolling roadbed in action - apply track voltage an away you go, figuratively. Great for checking those DCC installs and programming, running...
Close up of the rollers. These are 4mm diameter sealed bearings.
A Saddle set for N Scale track. The roller assembly is held in place by a 1mm Allen head grub screws.
Set Small 40B comprises of four saddles. Small 40A is the add-on set of two rollers.