just buy a big hex key "allen wrench" (3/8 doesn't completely fill the hole, but it's enough). Same as us electric drill users stick into our drills. Then, you can just put the corresponding socket (i.e., 3/8, or whatever matches) into the torque wrench, turn the torque setting way up, and crank away.
Regular socket wrench works too, but you're already carrying this one for tire changes.
Right?
