Fitter:

A machinist is a person who machines using hand tools and machine tools to prototype, fabricate or make modifications to a part that is made of metal, plastics, or wood.

Under the machinist title are other specialty titles that refer to specific skills that may be more highly developed to meet the needs of a particular job position, such as fitter (assembles parts), turning hand, mill hand, and grinder. Some titles reflect further development of machinist skills such as tool and die maker, patternmaker, mold maker, programmer, and operator[disambiguation needed]. Depending on the company, a machinist can be any or all of the titles listed above. A machinist is one who is called on to fix a problem with a part or to create a new one using metal working, plastic, or in some cases, wood.