Trailer-on-Flat-Car (TOFC) '5th wheel' hitching post and holding rails designed for securing 1950's vintage 35ft road trailers on flatcars. The idea is that you can load this TOFC rig onto a plain (interactive) flatcar to make it look like an empty TOFC flatcar. Matches the rig built in to my loadable Trailer Fruehauf 01 product. The holding rails in this version lay between the wheels of the road trailer.