I purchased [Pinhead security skewers][1], and the [instructions][2] suggest to tighten them to 8 N-m (70 in-lb) of torque. However, the skewers use a special key which doesn't appear compatible with a torque wrench, so how can I figure out how much torque I am putting on them?


  [1]: https://pinheadlocks.com/store/en/wheel-locks/6-2-pack-wheel-locks.html
  [2]: http://www.pinheadlocks.com/downloads/documents/Manual%20EDG.pdf