CNC Machining is a process used to manufacture high precision parts which are required to be produced with high specifications. CNC machining works great when you have a small quantity requirement of 100+ parts. CNC Machining is widely used to machine engineering-grade plastic, aluminum and metal parts to produce prototypes. The main advantage of using CNC machine for prototyping and low volume part production is the use of actual production materials. The parts are stronger, and are able to be tested because they are true materials that will be made is mass production.