Copper has excellent cutting performance, high strength, easy welding and corrosion resistance. During the CNC machining process, the structure is very stable, difficult to be affected by force. And it is usually used in connection parts, vault, stem bearing and so on. Beside copper has good electrical and thermal conductivity, so CNC machining copper prototype is often used in the cover of radiator and the parts of bellows, wave-guide, door, and lamps. And the durability makes the copper become the first choice for most jigs and fixtures.