The Cuetec Smart Extension works exclusively with any Cuetec weight adjustable cue to quickly and easily adds 6-inches to your overall cue length. Simply unscrew the existing butt cap with the bumper as if adjusting the weight. Then screw in the Cuetec Smart Extension. Leave it on or swap back and forth as needed. This extension is useful for making those hard to reach shots without a bridge and conveniently fits in most cue case accessory pouches.