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+1 is happy to offer professional drilling service on all bowling balls, a convenient service that can save you time and money! We have a full staff of professionals on site with over 50 years of ball drilling experience. We use a top of the line Vacu-Jig Milling System that enables our professional staff to drill all equipment with pin-point precision. Getting your new bowling ball professionally drilled just got easier! offers two types of drilling services to meet your bowling needs:

Custom Drilling Service

This service is recommended for advanced bowlers who currently own their own custom fit bowling ball. Custom drilling services can cost anywhere from $50 to $70. Installation of finger inserts, thumb slugs, switch grips, and thumb molds are also available for custom drilled bowling balls.

Basic Drilling Service

This service is recommended for the recreational bowler who would like to own their own bowling ball. This is a basic conventional layout using an average for the span and hole sizes. Standard drilling services can cost anywhere from $30 to $50.

Below is a table of the right handed (Reverse Ring/Middle for left handers) measurements used to drill your bowling ball. They are given for informational purposes only and are not guaranteed.

Basic Drilling Service Measurement Chart
  X-Small Small Medium Large X-Large
Middle Finger 2-1/2" 2-13/16" 2-15/16" 3-7/16" 3-1/2"
Ring Finger 2-5/8" 2-15/16" 3-1/16" 3-9/16" 3-5/8"
Hole Sizes
Middle Finger 39/64" 47/64" 51/64" 7/8" 15/16"
Ring Finger 39/64" 43/64" 47/64" 27/32" 7/8"
Thumb 45/64" 51/64" 27/32" 1" 1-1/64"

The fit of this service is not guaranteed and minor adjustments may have to be made to the hole sizes once the ball has been received. We will finish off all the holes and the ball will be ready to bowl with once it is received.

Drilled bowling balls may not be returned for any reason other than a manufacturer defect. Ball fit and reaction are not guaranteed by Drilling charges cannot be reimbursed.

Please allow up to 14 days for the service before your order will be shipped.