Use these miniature roller sets to break in, tune up and test your HO and On30 locomotives. Simply place between your track and the powered wheelsets of your engine, then turn up the power. Metal side frames conduct electricity from the rail through roller bearings to the wheel. Now your locomotive does its work while standing still! Makes it easy to detect, isolate and repair erratic operations so your locomotives will run smoother than ever before. Also great for putting steam locomotives on display. Shows off all that rod and valve motion, and lets smoke units work at full power. Works with straight DC or DCC power. Assembled, set of 4.
- Use the rollers to break in, tune-up, and test your locomotive
- To use, place between the track and powered wheels of the engine
- For DC, and DCC
- 4 assembled rollers included
- Helps to isolate and repair erratic operation so the engine runs smoother