I agree it's the hands. What I mean is, what is the point that they rotate around. I could show this better than type it, but I don't have the resources. As for why I ask: I don't get to hit many balls, or play many rounds, because of commitments that currently tie up my time and money. So I do a lot of non-ball drills, and make a lot of small air swings without a club. This question just popped up during one of those times; during the swivel, what is the pivot point of the hands?