(50mm Ball Kit or Frame Adapter is included at no additional cost with each Force 2K-ISC and Force 4K-ISC purchased) Use our Frame Adapter (built for Australian trailers) for: Caravans - with off-road coupling/articulated hitches (eg Hyland Hitch, Treg or DO35). Trailers - fitted with cable/hydraulic override brakes (most boat trailers weighing 750kg - 2000kg). How does it work? Attach the both the front & back plates to the trailer chassis using the screws & bolts provided. Position the Parkit360 under the frame adapter, remove the locking pin & drop the heavy duty post into the Parkit360 receiver, then insert locking pin. Bracket measures 130(w)x200(h)mm (each plate) Additional Benefits • It is a quick and easy connection point from your trailer to the Parkit360. • When you need more tongue weight