An inner blank sleeve for the JoPo Grips install. The inner sleeve will allow you to put in the thumb slug of your choice to be used with the JoPo Grips Twist stystem. Can be used with thumb solids, pre-drilled thumbs and custom thumb slugs.
JoPo Grips, a company with a new interchangeable thumb insert. This insert uses patented technology, creating a durable bowling grip that will enhance your bowling experience.
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 360.
* This blank sleeve accepts 1 1/4 inch slugs or inserts.