The STX Alliance shaft is a new revolutionary shaft from STX. Built with 'Flex Technology' which is exclusive to STX, designed optimize performance by matching a specific flex level to a players style and field position. 160 is the stiffest flex, 135 is mid-flex and 85 is max flex. Crafted by True Temper from lightweight and high strength composite materials. Best handle feel is achieved from a concave octagon profile with super fine texture. Pick up yours today.