This crane kit, once assembled, is the type typically seen mounted to a truck frame with a 20' flatbed. However, you may use it however you desire, which is why I designed it by itself. Once assembled, all three stages of the boom will extend, the boom rotates as well as lift up and down. The supports will slide outward, but do not have operable shoes that drop. Although I include all the hinge point pins, I would suggest, primarily in the hydraulics, that you replace them with either styrene or metal of some sort. The piece has passed the software checks for the frosted detail materials, but if there is a problem, contact me via the designer link or directly via email to modelmechanic@gmail.com