Viking Siege Cabon 5/16 x 18 Shaft. The carbon fiber process used to create the Viking Siege Pure Performance Shaft allows the carbon fiber and resin to be wound on the shaft structure in a single, continuous process weaving the fiber and applying resin simultaneously. Because sheet overlaps have been eliminated with this process, the end result is a more uniform structure with increased radial consistency and a smooth, sealed, un-sanded outer surface that stays cleaner and glides smoothly across your skin. The engineers at Viking chose a new approach to create a balanced shaft with improved sound characteristics and significantly reduced vibration. The Viking Siege shaft utilizes a new vibration dampening system that allows us to introduce mass over the length of the shaft. This new process not only significantly reduces the vibration found in most Carbon Fiber shafts but also provides a balanced, natural feel unmatched in the industry yet still efficiently transferring wicked energy to the cue ball.