If you have a Roadmaster tow bar and want to connect it to a Blue Ox baseplate, then use this adapter.This kit will adapt the following tow bars to a Blue Ox baseplate:Blackhawk 2 All Terrain with serial numbers above 16,500Sterling with serial numbers above 14,500NighthawkThe 031-5 adapters are made from heavy-duty, drop forged steel. They replace the existing connectors on the tow bar arms. Durable powder coat finish. Includes collars, 1/2" pins, clips, shoulder bolts, nylon washers and hardware.

 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