A comfortable and properly sized grip is essential to a good release. In addition to adding to your enjoyment of the game, a grip that fits can add revolutions, create more ball speed and make the ball feel lighter. It can also offer consistency when using a variety of different bowling balls. Turbo 2-N-1 Grips offers the greatest selection of styles, textures, sizes and colors to ensure you get the fit and feel that's right for you. And remember, once you get that perfect fit, you must maintain it. Inserts should be replaced every 6 months or 60 games to maintain optimal performance. This is an average and will vary based on your release.