This McDermott Cue Weight Bolt will fit inside the weight bolt system of a McDermott, Star or Lucky Cue. It is made out of metal and adds a 2 ounce weight to your cue. Measures 2 3/4" long with a 1/2" thread size. Customize the feel of your cue by adding or subtracting weight bolts from the butt. Easy to install just pop off the butt cap from the butt end of your cue and with the use of a 6mm Hex Key or Allen Wrench Tool (not included) unscrew the old bolt out and then screw the new one in. Available weights for these cues are 0.5oz, 1.0oz, 1.5oz, 2.0oz, 2.5oz, 3.0oz and 4oz. Adjusting the weight on your cue could be the factor of winning or losing a game.