It is the same shaft that I have been playing in my Callaway Rogue ST LS 3 wood and it works great for me in that head. I have never had a 3 wood that was too low spin for me, but that’s what I was seeing with this head. The Graphite Design HD is a mid spin shaft, but it is a bit more stout than the Kai’li Blue. I think this will be awesome for me.That should be easier to launch.