Fabricate, position, align, and fit parts of structural metal products.

Assemble, fit, fasten, and install parts of airplanes, space vehicles, or missiles, such as tails, wings, fuselage, bulkheads, stabilizers, landing gear, rigging and control equipment, or heating and ventilating systems.

Work below surface of water, using scuba gear to inspect, repair, remove, or install equipment and structures. They use a variety of power and hand tools, such as drills, sledgehammers, torches, and welding equipment. They conduct tests or experiments, rig explosives, or photograph structures or marine life.

Install, service, or repair automatic door mechanisms and hydraulic doors. Includes garage door mechanics.

Repair and service bicycles.

Diagnose, adjust, repair, or overhaul motorcycles, scooters, mopeds, dirt bikes, or similar motorized vehicles.

Replace or repair broken windshields and window glass in motor vehicles.

Install, adjust, or maintain mobile electronics communication equipment, including sound, sonar, security, navigation, and surveillance systems on trains, watercraft, or other mobile equipment.

Repair, maintain, or install computers, word processing systems, automated teller machines, and electronic office machines, such as duplicating and fax machines.

Separate blocks of rough dimension stone from quarry mass using jackhammer and wedges.