Interchangeable Thumb
- Easy to install two-piece system
- Interchangeable between different balls
- Four locking mechanisms providing added security
- Quickly and easily adjust your thumb size for a consistent fit and feel
- Bottom support ring for 1-1/4″ inners to secure the slug
- Adjustment bands allow for adjusting outer after drilling
Part Numbers:
66-430032-000 – Outer Interchangeable (black only)
66-430032-114 – 1-1/4″ Empty inner interchangeable (black only)
![Interchangeable Thumb Parts](http://www.ultimatebowling.com/cdn/shop/products/Interchangeable_Thumb_Parts_1600x1600-1.png?v=1635268266&width=1080)