Roadmaster calls the Sterling the World's Strongest Aluminum Tow Bar. And now, it's even better thanks to non-binding All Terrain technology. The Sterling All-Terrain 6000 lb 6 wire weighs just 35 pounds, yet pulls up to three tons. Steel and stainless steel at every critical point ensure superior strength and structural integrity. The Sterling All-Terrain is easy to connect, and its stainless steel inner arms telescope, center and automatically lock as you pull away. Once you’ve reached your destination, a unique storage lock secures the Sterling All-Terrain in its stored position.