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 will be offered at a price lower than bowling center rates. 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 Storm Real Absolute from Hi-Sports. Please refer to the outer box in the photo for specifications. The following is a quote from Hi-Sports. The second installment of the Absolute series. The coverstock uses a pearl material that is resistant to oil, enhancing trajectory stability. The "Sentinel™ Core," made from a single specific gravity, has a unique shape that shows a straight trajectory at the front of the lane and creates a consistent change in direction and continuity from the middle to the end of the lane. The backend hook is a strong arc trajectory that moves towards the pins, hooking smoothly with high rotational force. Even after hitting the pins, the trajectory does not deviate, creating a powerful pin action. It is also ideal for bowlers with fewer revolutions and is finished as a product that can handle a wide range of lane conditions. The "Sentinel Core," with its unique shape, is designed to produce straight-line performance in the rough areas at the front of the lane, which suits current lane conditions. The Real Absolute also has an oil-resistant cover, but it has continuity in its rolling feel from the middle of the lane to the backend, making it easy to find the breakpoint (where it starts to hook) and easy to throw. The hook is more of a "coming towards the pins" impression rather than a sharp hook, and the continuity of rolling even when entering from an inside line makes it easy to adjust your line even for those with many revolutions. In any case, the pin action is good and the balance is excellent.