LUCASI BPS Screw-In Rubber Pool Cue Butt Stopper Made of thick rubber Protects your pool cue butt from cracking and chipping caused by dropping A lost pool cue butt stopper can not only leave your pool cue open to damage, but it can affect your game as well Fits Lucasi Custom and Lucasi Hybrid brand pool cues Easy to install  just screw into place with a Philips head screwdriver