This is a Shinsei Mini Power car carrier. It's an ultra-rare, new, and preserved item from 40 years ago. The connection part has been modified so it can be connected to a rare Corgi truck (see image 4, and image 3 for reference, which shows an unmodified used model). The Corgi truck itself is unmodified. I purchased this for display purposes, as the tractor heads and trailers can be connected to each other. It's 1/64 scale, so Tomica cars can also be loaded. The Corgi trailers have been opened for photography, and the Kit Kat version is unopened. This is a set of 3 trailers, which are difficult to find. Thank you for your interest.