Use of various measuring equipment (micrometers, dial calipers, vernier calipers, depth mics, surface gages, dial indicators, etc.), all types of hand tools (hammers, punches, screw drivers, hack saws, socket wrenches, hex wrenches, pinch bars etc.) at high frequency. Use of engine lathes, vertical & horizontal mills, radial drill presses, surface & cylindrical grinders to make tooling, jigs, fixtures, gauging, and various types of maintenance machines needed.