The Roto Grip MVP+ accessory case was built to meet the storage needs of the serious bowler. Multiple zipper pockets and mesh pockets for storage. Plus a foam insert to hold Securely attach thumbs and interchangeable tools. And what makes the Roto Grip MVP+ accessory case Even more impressive is that it fits comfortably in the compartment main part of the Roto Grip MVP + backpack. It's okay, you can thank us later