Knowledge of machines and tools, including their designs, uses, repair, and maintenance; this includes the ability to operate, calibrate, tune, and synchronize, and perform a complex rapid adjustment on equipment, machinery, and tools such as motor vehicles, motorized equipment, mechanic tools, drill press, welder, forklift, hydraulic press, battery tester, steam cleaner, power washer, and related materials used in performing essential functions. However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractors legal duty to furnish information.