Inner sleeve that twists into the bowling ball, with slug included.

**Does NOT contain outer sleeve**

The thread-like feature absorbs the load of the weight and the velocity of the bowling ball delivery; i.e. visualize pulling a nut straight off a bolt without unscrewing it.
The Twist cannot be removed from the bowling ball without the inner being rotated 360º

For a custom, comfortable fit, with fast shipping from Mojo Pro Shop.