An inner thumb sleeve with slug the twists into the outer sleeve for the JoPo Grips install. The inner sleeve with slug lets you get going and drill your thumb with out the need of an additional thumb slug purchase. Just twist in, drill and go bowling.
*JoPo Twist Outer Sleeve required.
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 360º