Pure X PSK 11.75mm ShaftPure X PSK 11. 75mm Pool Cue Shaft The Pure X PSK 11. 75mm Shaft is a precision engineered "Skinny Shaft" designed for players who demand accuracy and low deflection. Built with Pure X Technology, the PSK delivers exceptional cue ball control perfect for players who rely on english and precise position play. Available in multiple joint configurations to fit a wide range of cues, the Pure X PSK is a high value upgrade for serious players. Pure X