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. THERE IS NOTHING TO HATE ABOUT THIS DV8 BALL! The new DV8 Hater is a hook monster and an excellent go-to for bowlers facing heavy conditions and for bowlers who need a little help getting the ball to hook. The Hater has a new core and cover combo; the ultra-aggressive Hater core is wrapped around the most violent version of the HK22 DV8 used, HK22 Havoc Hybrid, and is finished with 1500 grit to bite through the oil. The Hellcat XLR8 and Hater are both made for oil, but the Hater will respond more on the backend for a better angle and more strikes! Level: $$$$$$ Color: Cherry/Red/Blue Core: Hater Coverstock: HK22 - Havoc Hybrid Cover type: Hybrid Reactive Finish: 500, 1500 Siaair Micro Pad Weights: 12-16lbs Hook: 350 Length: 120 Performance: Aggressive Overall Hook Lane Condition: Heavy Oil Warranty: 2 Years from purchase date RG: 16lbs (2.545) 15lbs(2.539) 14lbs(2.556) 13lbs(2.597) 12lbs(2.593) Diff: 16lbs(0.047) 15lbs(0.054) 14lbs(0.054) 13lbs(0.041) 12lbs(0.041) Asy: 16lbs(0.021) 15lbs(0.024) 14lbs(0.024) 13lbs(0.014) 12lbs(0.014)