13.9mm Uniloc Joint Carbon Fiber BREAK SHAFT Fits Predator BK Rush Pool Cue Jump
Uniloc joint (See pictures for an example). It will fit Predator, Lucasi, Koda, etc. Uni-Loc joints. I'm currently using one of these on my jump-break cue myself, and couldn't be happier. THESE THINGS BREAK LIKE A TON OF BRICKS!