I've never seen a coupler with two "legs" coming into the height adjuster. The ones I see the height adjuster is a formed C channel with a cast coupler or lunette eye bolted on. Or in as it may be.@flushcut That's a bulldog hitch coupling, with the leveling setup. About the best money can buy, but it can live up to its name and bite your fingers if you aren't careful!!! I always kick mine closed because i had to learn that the hard way