Workers in the production sector fabricate a variety of metal products, primarily for installation on construction projects. Production items are typically catalogue products that are not custom-made for a particular construction project. They include products such as fire dampers, smoke dampers, louvers and VAV boxes. Production workers are highly skilled factory workers who must fabricate metal products to precise specifications. They include assemblers, welders, brake operators and polishers. They also include other positions that are associated with the fabrication of sheet metal products, such as shipper/receivers and helpers.