Optional ball drilling service is available for an additional charge of $30. If you choose the drilling option, please add 7 - 10 days additional shipping time. Use the drop down menu below to choose the drilling option and your size. Note: by choosing "No Drilling" or by not choosing a size option in the drop down menu your ball will not be drilled. See the drilling fit information below to determine your size. Drilled bowling balls may not be returned for any reason other than a manufacturer defect.