Sgt. Brad Kay, Royal Australian Air Force 36th Squadron aircraft technician, hands Aircraftsman Aaron Kouyoumtzoglou, Royal Australian Air Force 36th Squadron aircraft technician, a socket wrench April 19, 2016, at Joint Base Lewis-McChord, Wash. Many of the tools used for C-17 maintenance are calibrated to apply specific amounts of torque for various aircraft parts. (U.S. Air Force photo/Senior Airman Jacob Jimenez)