The THOR HAMMER by Joss Cues uses their full core technology to deliver a break cue with a once piece cue feel. The Phenolic joint is ideal for control and maximum transfer of energy. THOR comes in two weights, a light weight 18-19oz, you can get high acceleration and velocity to break the rack wide open. The Heavy, slower acceleration and velocity but much greater mass behind to break the rack. Full core technology. This cue, as with all Joss cues, has a Canadian hard rock maple core through the entire butt section.