Make sure your fleet is running smootly with Bachmann E-Z Riders HO and On30 Display and Test Stand Rollers. E-Z Riders allow you to run your loco in place on your workbench or in a display case. Simply place them on a powered piece of track and place one under each of your locomotive′s powered axles. Non-rolling (fixed) versions are also available to support unpowered axles. E-Z Riders work for HO and On30 locos. The E-Z Riders Display and Test Stand Rollers set is one of many handy Bachmann modeling tools. WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.