Check the listing for details. JoPo Grips Twist Outer Sleeve. Color: Assorted, Condition: New. Listed at 15.53 USD. JoPo Grips Twist Outer Sleeve Discover the innovation in bowling grip technology with the JoPo Grips Twist Outer Sleeve. This outer sleeve is designed for easy installation of JoPo Grips, featuring a unique interchangeable thumb insert that sets it apart from the rest. Key Features: Patented Technology: Our interchangeable thumb insert utilizes patented technology, ensuring a durable and reliable bowling grip. Thread-Like Design: The thread-like feature absorbs the load of the weight and the velocity of the bowling ball delivery, providing a smooth and controlled release. Enhanced Bowling Experience: Experience a new level of control and comfort with the JoPo Grips Twist Outer Sleeve. Visualize the strength of our design by considering pulling a nut straight off a bolt without unscrewing it. The Twist Outer Sleeve ensures stability and consistency in your bowling performance. Easy Installation: The Twist cannot be removed from the bowling ball without the inner being rotated 360º, guaranteeing a secure and reliable fit. Upgrade your bowling gear with the JoPo Grips Twist Outer Sleeve – where innovation meets performance.