CNC machines turn a digital file into a sequence of computer instructions, which are sent to a motorised tool. The tool turns the block of material into a finished product by cutting it in the appropriate places and can provide much greater accuracy than conventional machining.

For certain auto components, the process of CNC machining, which involves carrying out tasks like drilling and boring with computer control and automation, now serves as a favourable option for both prototyping and production.

The manufacturing technology is also particularly useful for customisation of vehicles and their components, since CAD allows for the quick alteration of part designs.