Experience enhanced bowling performance with the Turbo Power SB Finger Insert. Our patented design, including the unique glue channel on the outside surface, ensures a cleaner installation, preventing glue from seeping to the surface of the bowling ball. Key Features: Power Lift 1/4” on Side 1: Increases loft and length of release to the target. The finger pad has a sharp, clean feel with its flat edge and smooth surface. Semi-Super Bump on Side 2: Ideal for a relaxed grip, with a smooth, rounded bump near the front edge. Helpful size indicators on the outside and inside for easy fitting. Size Options: 31/32" Standard diameter for grip sizes 19/32" - 13/16" (#0 - 8). 1 1/32" Large diameter for grip sizes 53/64" - 29/32" (#8.5 - 11). Specifications: 40 Shore A durometer hardness. Available in 19 sizes and 9 color options to suit your style. Sold Individually. Choose the Turbo Power SB Finger Insert for a sharp, clean feel with its flat edge and smooth surface on the finger pad. The design of the Semi-Super Bump is perfect for bowlers with arthritis or those seeking a more relaxed grip pressure. Upgrade your game with Turbo Power – where innovation meets precision!