Hook Potential rating system.

To hook or not to hook.
It is no longer a question.

Hook Potential

To find the perfect ball, you need to know exactly what that ball is designed to do. Roto Grip’s new HP system separates our balls into lines based on their hook potential, or HP. The HP4™ line offers products with the most aggressive hook potential. The amount of HP decreases incrementally as the number line decreases, with HP1™ representing balls with the smallest amount of hook potential.

The new HP ball lines make it easier to identify and build a complete tournament arsenal, equipping you to dominate on any lane condition. Or, whether you’re a newcomer looking for your first ball or a bowling veteran looking for a ball that perfectly complements your game or existing arsenal, the new lines help narrow your search to only balls that will give you exactly what you’re looking for.