JoPo Grips is a company with a new interchangeable thumb insert called the Twist. 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. The Twist cannot be removed from the bowling ball without the inner being rotated 360º.

The JoPo starters kit includes:

• (1) Drill bit with calibrated stop collar
• (12) Outers
• (6) Inners /w slugs
• (1) Twist Tool
• (1) Bottle of super glue