The CNC operation box has been applied in many fields, one on the market is made of steel (including stainless steel), and the other is made of aluminum alloy. The two have different characteristics. The steel can be customized to various sizes and shapes, processed into different colors, and the internal structure will be different. Since aluminum alloy is produced by molds, it can only be selected in a limited number of sizes in depth, but generally the width and height can be customized arbitrarily. Due to the characteristics of aluminum, it can be sprayed, oxidized, sprayed, brushed and other surfaces The treatment makes the aluminum operation box more diverse in appearance. At the same time, due to its light weight, aluminum is more convenient in use. When used in conjunction with the cantilever, the pressure on the cantilever is smaller, and the choice of span and durability of various cantilevers is increased.