This Cuetec and Scorpion Weight Bolts Set comes in a 5 pack of 0.5oz weights. They will fit in a Cuetec and Scorpion Cue that features the new stackable weight bolt system. Each bolt measures 5/8" in Length x 5/8" in Diameter. Customize the feel of your cue by adding or subtracting these 0.5oz weights from the butt. Easy to install just unscrew the butt cap that is at the bottom end of your cue and with the use of a Phillips screw driver (not included) put the weight bolt in. Adjusting the weight on your cue could be the factor of winning or loosing a game.