The listed price is for the ball only. Drilling services are available for an additional fee. The cost will vary depending on the specific work required, but we will offer it at a price lower than that of a bowling center. We can also accommodate difficult tasks such as IT work if you consult with us in advance. We will discuss the layout with a dedicated driller while you send us your measure sheet, so please feel free to ask any questions you may have. This is a new listing for the Roto Grip Gem Garnet from Hi-Sports. Please refer to the outer box in the photos for specifications. The following is a quote from Hi-Sports. While many balls in the Gem series are strong in oil, the Garnet has the most straight-line performance in the series. The "Defiant LRG Core" inside is a core that symbolizes Roto Grip's concept, with no flip-block and consistent rolling. This core is known for its ability to maximally cover throwing errors where the axis can easily change with release. Of course, it starts rolling early, but its continuity is also high, making it exceptionally stable. It is not a ball that shows flashy hooks, but it has the highest coefficient of restitution and gently knocks down all 10 pins. This ball excels for bowlers with slower ball speeds or on lane conditions with less oil, and it showed the best response when taking a straight line. Coverstock: XtremeTrax+ Pearl Reactive Core: Defiant LRG Core RG: 2.470 (15lbs) Differential: 0.053 (15lbs) Mass Bias Differential: 0.016 (15lbs) Flare: High Hardness: 73-75 Color: Garnet + Dark Garnet Surface Finish: 1500 Grit Polish Available Weights: 12-16