The WALCO® 40 set consists of two identical brackets made out of blue-galvanized steel. Commonly used gaskets can be installed on the prefabricated wall panels. When sliding the wall panels together, the brackets hook into each other in a dovetail-like manner and tighten up the joint. This allows the wall panels to be pre-manufactured to a large degree in a superior and advanced fashion and then connected on site with no screwing or nailing needed