There power taper thumb inserts. These are the only kind I use. I damaged my nerve at the base of my thumb back in 1997. I quit bowling for a while because of it. I then started using these type of thumb inserts when I got back into the game and have used them ever since.
I know some may think it causes one to hang up in the ball, not true! In fact, it almost makes the thumb feel like it's an oval. No hang up at all!
Great product!
Edited on 12/11/2007 12:28 PM