This ball ships professionally PRE-DRILLED for your convenience. We?ve simplified the process so you can hit the lanes faster. Based on the ball weight you choose, we?ll drill it to a standard hand size that fits most bowlers in that weight range: X-Small (6lbs): Ages 8 under Small (8?9lbs): Ages 8?11, women?s ring size 8?11 Medium (10?12lbs): Ages 11?15, adult ring size 10 or under Large (13?14lbs): Men?s ring size 10?12 or larger hands X-Large (15?16lbs): Men?s ring size 13+ or extra-large hands Want a different drilling size than standard? Email us immediately after checkout with your order number and your preferred size. Brunswick Mesmerize Bowling Ball The Brunswick Mesmerize is engineered to deliver the biggest hook potential without compromising on control or usability. Developed alongside the Vaporize, both balls introduce groundbreaking technology and performance enhancements to the Brunswick lineup. The Mesmerize stands out as a high-performance option, featuring a Tri-Elliptic Core with DynamiCore2, and an advanced coverstock combining HK22 with Cohesion and Evo Solid additives. Aimed at delivering an intense hooking reaction, the Mesmerize features a distinctive four-color look and sharp two-color logo, making it as visually striking as it is powerful. Bowlers can expect a powerful backend motion, complemented by its 2.51 RG, 0.056 differential, and 0.017 intermediate differential, offering an impressive flare potential of 4?5 inches. The DynamiCore2 technology, which enhances durability and hitting power, ensures that the Mesmerize maintains its peak performance over time. The HK22C-Evo Solid cover gives the ball incredible strength and versatility, handling a variety of oil volumes while providing consistent results on medium to heavy oil lanes. If you're looking for maximum hook and pin action, the Brunswick Mesmerize is the perfect choice. Its combination of advanced technology, performance-enhancing features, and visually appealing design make it a must-have for competitive bowlers. Specs at a Glance: Brand: Brunswick Coverstock Type: Reactive Cover Name: Brunswick Evolution Solid Reactive Core: Brunswick Tri-Elliptic Core Core Shape: Asymmetrical Core Surface Finish: 1500 Grit Flare Potential: 4 ? 5 Inches Differential (Diff): 0.056 (15LB) Radius of Gyration (RG): 2.51 (15LB) Lane Conditions: Medium ? Heavy Oil Performance Level: High Performance Bowling Balls Mass Bias Strength: 0.017 Scent: None Weights: 12LB, 13LB, 14LB, 15LB, 16LB Ball Color: Black, Blue, Red Add the Brunswick Mesmerize to your bag and dominate the lanes with unmatched hook potential and precision.