Traditional rear weighted balance right system comes with a special butt stopper and weight bolt attachment. This rear extension goes through a small hole in the butt stopper and screws directly in to the existing weight bolt system. Just change out your old butt stopper with the new one and screw in your extension! Instantly, hard to reach shots are easier. Even better, simply twist to remove when extension is not needed to remove.For use on Lucasi Custom, Lucasi Hybrid, Players, Players Pure X and Players Flirt cues with Plug Style BumperSpecifications:Extension Total Length: 12.5″Extension Handle Cue Length Addition: 10.5″Must have at least a .5oz weight bolt in cue for Extension to screw intoFinish: Black High-Gloss