ode I did pop one loose with an adapter torque wrench, but it just spins. They don't need changed anyway, unless one would be playing them different lengths than normal. I have mine too long, so I'll be cutting them down a bit. Shafts are flexing too much for my taste(graphite S flex).
I really don't care for those 'slots' on the sole. Just too close to the face imo, causing some follow-through problems.
That said, they are a lot longer for me than when I hit hybrids of the same lofts. And much straighter, which can never be a bad thing. Also easier to hit than an ordinary iron.