Multi Purpose Span Ruler and Layout Tool designed for every ball driller from beginner to professional. It is also designed to help you improve fitting and drilling accuracy from ball to ball. There are four measuring scales, A, B, C, and D, utilizing both sides of the span ruler.
1/2 scale increments to begin the drilling layout of the thumbhole.
Hooks into any hole to get accurate measurements from ball to ball. Also, it has an angled hooked end to allow sweeping motion across undrilled finger and/or thumbhole area. This allows you to apply accurate cut lines for undrilled holes.
Allows you to find the accurate span measurement location on your customer's finger.
Serves a variety of functions, especially for the professional. Measures from 0" to 6 3/4" flat across the ball. Excellent for mapping out bowling balls and laying out balance weight hole locations.