【Complete 3-Piece Measuring Set】Specifically designed for bowling ball drilling measurements. The small blue gauge measures 31/32" finger holes, the red gauge is made for larger thumb holes, and the gray gauge is designed both for JOPO and Switch Grip outer sleeves
【Cost-Effective Alternative】Made with durable 3D-printing, delivers the same measurement accuracy and functionality as expensive aluminum gauges
【Precision Meets Durability】The optimized 3D-printed structure ensures each gauge is sturdy, stable, and provides reliable, repeatable measurement results. Make precise drilling adjustments with confidence
【Easy to Use】The clear color-coding corresponds intuitively to different hole types—no complex learning required. Lightweight and portable, it fits easily into a toolkit or bowling bag for on-the-go hole checks
【Wide Compatibility】Whether you're a technician performing professional drilling adjustments, a seasoned bowler fine-tuning personal equipment, or a beginner learning drilling basics, this set is a practical and essential tool