Uniloc Butt and Shaft Joint Protectors, used for any cue with a uni-loc quick fit pin joint. Good thread fit. The original Predator butt protecting cap was terrible - purchased three of them and all of them the threads stopped biting. Its because the originals don’t screw down far enough up the pin joint thread. Ive extended the amount of thread turns whilst maintaining a nice tight joint so these will hopefully last much longer - and much cheaper than buying Predator replacements!