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. The VTC-P18 Pearl Reactive cover was first used on the Winner and instantly became a fan favorite. This formula of pearl increases traction throughout the lane while still retaining enough energy to respond down lane. Created with versatility and reaction in mind, the Hustle Au does not disappoint. Compared to the rest of the line of Hustle's, the Hustle Au just like the Hustle 3TP will provide the most length with more backend reaction due to the pearl cover. - Core: Hustle - Coverstock: VTC-P18 Pearl Reactive - Finish: 1500-grit Polished - RG: 2.53 - Diff: 0.031