Gauges & Rulers

Jonell Bowling Ball Span Gauge Best span ruler/gauge Gets true span by eliminating bevel from thumb or finger holes

Jonell Pitch Gauges For determining pitch on all sizes of holes. Comes with plastic storage case. Set of two, one for thumb and one for fingers.

Pro Shop Starter Kit Included in set is Turbo Pro Sect Quarter Scale, an Armadillo, Jonell Span Gauge and a Span Ruler with stud.

Innovative 6 inch Span Ruler Flexible steel for maximum durability 1/2" post allows for accurate true span measurement Very accurate with marks to 1/16" increments

Classic Pitch Gauges - set of 3 Set of 3 gauges enables the user to check any size hole accurately Spring loaded gauges spring forward, reverse and lateral (side) pitch