The present invention relates to a novel adjustable billiard cue stick that is capable of being adjusted to multiple different lengths and configurations. In one embodiment, the pool cue stick includes a spring-loaded mechanism having a tension rod with fixed metal pegs. The metal pegs are locked into corresponding receiver holes for locking the pool cue stick into a desired length. A button releases pressure from a spring of the pool cue stick enabling the length of the cue to be adjusted. In another embodiment, the pool cue stick includes a segmented screw drive system in the center of the cue that can be manually or electrically cranked for adjusting the length of the pool cue stick.

A cue stick is fitted with an extension adapter secured in its butt end having an external extension connector adapted to matingly engage with an internal extension connector of an extension to secure the extension to the butt end. The external extension connector is not covered by the bumper and can be left on when the extension is fitted to the cue stick, but when the extension is secured, the extension and butt end of the cue stick will be substantially flush with each other, the external extension connector now being located inside of the extension.