The Evil Eye bowling ball boasts impressive core numbers: 2.495 RG and a .045 total differential. What makes the Evil Eye truly unique is its after-drilling numbers. Thanks to its distinctive core shape and protrusions, it offers the widest intermediate differential range of any symmetrical bowling ball ever created. With an intermediate drilling range from .009 to .023, you can choose to drill it as a symmetrical ball or opt for an asymmetrical drilling layout to fine-tune your hook.