This bowling ball ships PRE-DRILLED. There are 5 sizes and the sizes that we drill are based on the weight of the ball. X-Small: 6lbs- Ages 8 and under, Small: 8lbs and 9lbs- Ages 8-11 and womens ring size from 8-11, Medium: 10lbs, 11lbs, and 12lbs, Ages 11-15 and Adult Ring size 10 or lower, Large: 13lbs and 14lbs, Mens ring size 10-12 or people with larger hands, X-Large: 15lbs and 16lbs, Mens ring size over 13 or people with extremely large hands. If you would like a different size drilled for the weight you selected, you must contact us via email as soon as your order is placed with your order number. Pre-Drilled bowling balls cannot be returned or exchanged. Just like a predator in the wilderness, the Crimson Jackal thrives on two critical factors: lightning speed and unmatched agility. The Crimson Jackal emerges as the apex predator on the lanes, boasting an unprecedented ability to change directions in the blink of an eye and respond to friction faster than any Jackal before. The Crimson Jackal is a predator with a killer instinct like no other. We’ve conquered the challenge of creating a coverstock that delivers lightning-fast response in a heavy oil environment with new Propulsion HV+ cover technology. The strongest Propulsion shell to date, Propulsion HV+ takes performance to the next level. When paired with the Predator V2 core, this shell guarantees bowlers can wield this monster core even when attacking the lanes at steep angles. Powering the Crimson Jackal is the Predator V2, a legend in its own right and a dynamic powerhouse. Previously seen in other great Jackals such as the Jackal Ghost; this fast revving and huge flaring, asymmetric beast is designed to be the strongest core in any bowler’s bag. Be prepared to dominate the lanes with this force of nature! When to Use Speed Dominant Bowlers - For bowlers with more ball speed and lower rpm, the Crimson Jackal is a pearl that can be trusted to create angle and shape when other pearls would be too weak to get started or get around the corner. Balanced Bowlers - For balanced bowlers the Crimson Jackal will be the first pearl out of the bag and should allow for steeper angles earlier in blocks. When other angular balls just seem to get too far down lane before making their move, the Crimson Jackal with the Predator V2 core should provide more mid-lane stability while the Propulsion HV+ cover gives great down lane pop. Rev Dominant Bowlers - For the bowlers with the lowest speed and/or the highest rev rate the Crimson Jackal gives them an asymmetrical core option that is clean enough through the front of the lane. So many rev dominant bowlers are forced out of asymmetric cores because they are fast revving and early. The Crimson Jackal is clean and angular, allowing rev dominant bowlers to use it when there is lower friction, but they want a big pearl asym Weight Block: Predtor V2 Asymmetric Coverstock: Propulsion HV+ Pearl Reactive Finish: 5000 Grit LSS Weights: 12-16lbs Length: 76 Backend: 89 Hook: 74 Flare Potential: 7"+ RG: 16lbs (2.48) 15lbs (2.47) 14lbs (2.51) 13lbs (2.57) 12lbs (2.64) Diff: 16lbs (.047) 15lbs (.054) 14lbs (.049) 13lbs (.040) 12lbs (.030) Int Diff: 16lbs (.013) 15lbs (.015) 14lbs (.014) 13lbs (.011) 12lbs (.010)