American Air Filter - - Responsibilities: Operates various hand tools, such as pliers, vice grips, hammers, squares, chisels, and screwdrivers, and power tools, such as grinders, drills, come-a-longs, saws, hydraulic knock-outs, and hydraulic jacks, to fit filter units.; Uses TIG welding to put together parts of a filter unit.; Reads blueprints to know how to fit metal parts together.; Measures and uses math skills to accurately place parts and drill holes.; Operates a crane or hand truck to move filter units.