Analyzes specifications, lays out metal stock, sets up and operates machine tools, and fits and assembles parts to fabricate and repair metalworking dies, cutting tools, jigs and fixtures, gauges, samples, prototypes and machinists' hand tools by performing the following duties. Applies knowledge of tool and die design and construction, shop mathematics, metal properties, and layout, machining, and assembly procedures: studies specifications such as blueprints, sketches, models, or descriptions, and visualizes product to determine materials required and machines to be used to fabricate parts.