Vise Lady P/O Bowling Finger Inserts (Power Lift/Oval)Vise Inserts feature 3 different combinations to fit anyone’s game. The Power Lift helps the bowler create more revs with the 1/4″ forward pitch that aids grip. The oval side provides the perfect natural feel for a smooth consistent release.Lady Vise P/O Inserts are available in 8 sizes and 9 colors.- Sizes 17/32 through 3/4 have O.D. of 7/8″