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)

Download the Instruction Guide