Rear Tension Wrench

thingiverse

When learning to pick a lock such as a bilock it's easy to get the tension wrong and damage the front of the lock. Other locks are just hard to tension easily and still leave room for the pick. By tensioning it at the rear you can learn how to pick it without risking damage to the lock or restricting pick access. As you improve you can move to more normal tensioning techniques. From a locksport perspective it's probably a training tool only. Requires 3mm rod as a turning arm. With a long 3mm rod you can hang weights off it and carefully control your tension in a "hands free" fashion. Good for experimentation.