With the eitech Construction metal construction kit, at least three different mechanical models can be constructed from over 270 components. In addition to a rotating construction crane with cable and hand crank, the set also enables the construction of a lifting bridge or a windmill. The perforated metal struts are connected using classic screw connections. The matching assembly tools and fully color-illustrated assembly instructions are included in the scope of delivery. Thus, the construction set provides clear insights into elementary mechanics and stable construction methods.