This unit will bolt on using the normal 2 bolt fixing that you would usually use to fit a normal style UK 50mm towball.
once bolted on and drilled to your USA ball size , this alows you to tow non UK trailers.
You are purchasing The Black Item Only.
Comes Pre Drilled For Two Bolt Fixing, Drill Your Own Ball Hole. (To Allow For Different Size Ball Shafts)
Bolts and Balls Are All Available.