Metal and plastic machine workers set up and operate machines that cut, shape, and form metal and plastic materials or pieces.
Insulation workers, also called insulators, install and replace the materials used to insulate buildings and their mechanical systems.
Assemblers and fabricators assemble finished products and the parts that go into them. They use tools, machines, and their hands to make engines, computers, aircraft, ships, boats, toys, electronic devices, control panels, and more.
Boilermakers assemble, install, maintain, and repair boilers, closed vats, and other large vessels or containers that hold liquids and gases.