A professional who makes parts for and assembles prototypes of metal furniture according to specifications to test practicality of new designs. Responsibilities include:

• Lays out and marks parts, following blueprints, sketches, and verbal instructions, using calipers and scribers.
• Cuts and forms parts from metal, such as steel and aluminum, using lathe, power saw, snips, and handtools.
• Joins parts, using screwdriver, wrench, and welding torch.
• May alter design of finished model according to revised specifications.