This is very interesting! It never would have occurred to me to use these for TOS relief. I had a pair that I used to strengthen my left hand back when I was learning to play guitar. Actually I should say trying to learn guitar; I have a tin ear and was pretty hopeless. ;-) The balls get easier to use as you practice, although clockwise never got as easy for me as counterclockwise... I look forward to hearing how they work for you!

PS to Jo*mar - I'm extremely envious - the thermometer at the bottom of your post says it's 78F where you are. It was 108F here today! So ready for summer to be over!