Minimizes sway caused from passing trucks and sudden wind gusts. Double friction disc brake principle provides constant sway abatement. Attaches with easy socket and spring clip connectors. Removes for easy storage.

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov