Note that in britain the regulation states that trailers made use of over the road without any brakes can only hold a gross fat of 750kg. For people planning to haul greater hundreds we provide 3 types of braked couplings which are delta couplings, pole couplings and spring damped couplings. https://typesoftrailerhitchcouple23332.blogars.com/26786118/little-known-facts-about-types-of-trailer-hitch-couplers