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. Roto Grip Optimum Idol Pearl Bowling Ball The Roto Grip Optimum Idol Pearl is a high-performance masterpiece designed to complement the original Optimum Idol, bringing new levels of length, backend, and traction to heavy oil conditions. Wrapped in a vibrant Pink and Purple finish, this bowling ball makes its mark as the first-ever Idol Series release in the U.S. featuring MicroTrax? Pearl Reactive coverstock?a formula known for its exceptional oil-handling abilities and explosive backend motion. At the core, you?ll find the proven Ikon Core infused with A.I. Core Technology, offering enhanced energy retention and downlane continuation. With an RG of 2.47 and .056 differential, this ball delivers a strong midlane read with powerful angular motion off the spot. Finished in Storm Reacta Gloss, the Optimum Idol Pearl glides through the fronts and digs in at the right moment to finish strong. Whether you're looking to open up the lane or transition from earlier-rolling solids, the Optimum Idol Pearl is engineered to give you that extra edge when it counts most. Technical Specifications: Brand: Roto Grip Coverstock Type: Pearl Reactive Coverstock Name: MicroTrax Pearl Reactive Core Shape: Symmetrical Core Name: Ikon A.I. Core RG (15LB): 2.47 Differential (15LB): .056 Mass Bias Strength: N/A Flare Potential: 4 ? 5 Inches Surface Finish: Storm Reacta Gloss Lane Conditions: Heavy Oil Performance Level: High Performance Bowling Balls Color: Pink, Purple Available Weights: 12LB ? 16LB Scent: None High oil, high stakes?get optimum length and backend control with the Optimum Idol Pearl.