Engineered to eliminate sloppiness, the Companion series offers the smoothest ride on the road. The Companion attaches to your Turnoverball under-bed mounting system, which means you can pull a fifth-wheel or gooseneck hitch with the same system! Just like the Turnoverball, the Companion gives you easy install and removal without sacrificing sturdiness, reliability, or towing power. - Companion 5th Wheel Hitch Base