Metal 3D assembly model is generally made of brass or stainless steel. The model assembled by metal splicing is called a metal assembly model. Common metal assembly models include architectural models, military models, musical instrument models and so on. The metal assembly model is the most high-end assembly model at present, and it is also the type of assembly model most sought after by players. The assembled model is based on the model. If the model is an object made in proportion to the shape and structure of the real object, then the biggest difference between the assembled model and the model is that the assembled model is in a certain order and technical requirements. The model is assembled by connecting or fixing various parts (components) together. This process is completed by the players themselves. Players can experience the fun of doing it themselves and using their brains during the assembly process.