[rotorwrench]

The coiled ones don't break as easy as the standard spring pin but they are spring steel and that makes all of them a bit on the brittle side. I've replaced a lot of roll pins that are used in applications where torque is applied and its the only thing in there acting as a key to torsional movement. If it works for you, go ahead but don't be surprised if one day it decides not to shift into gear.

Just about every form of malleable metal work hardens when you beat on it.