For the JoPo Twist interchangeable thumb system. The thread-like feature absorbs the load of the weight and the velocity of the bowling ball delivery; i.e. visualize pulling a nut straight off a bolt without unscrewing it. The Twist cannot be removed from the bowling ball without the inner being rotated 360º. Does not include inner sleeve.
Easy to install and superior quality compared to other systems
Length: 2 3/4.
*Requires a 1-1/2″ drill bit.
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Love the JoPo Twist Interchangable Thumb Sleeves! The best on the market! I only have a couple suggestions. 1. I love the locking concept and that they are threaded for back-up. I would have made both left and right hand threads. The left hand threads for the right handers and the right hand threads for the left hander. That way the outer insert cannot come out upon release! 2. The outer sleeve cracks very easy. I have had two sleeves come cracked. I also had a couple outer sleeves crack in the ball. On one ball, the bottom of the sleeve broke out and in another ball the sleeve cracked at the top and worked its way down to about the middle of the sleeve. Maybe make them slightly thicker to offset this issue. I have had no issues with the inner sleeve. Even with those issues, they are still by far the best on the market!
Best price online when buy 5 or more with lots of colors options