Project X VRTX Blue Wood ShaftVRTX Blue features a firm profile throughout the shaft, producing a very stable mid low ball flight. Developed with the insight of 20+ years of custom club fitting expertiseVRTX shafts are high performance products engineered exclusively for custom fitting and available only through world class fitters at our authorized Performance Fitting Centers. Technology & Features MODERATE TEMPO Tempo is not how fast you swing it, it is how you swing it fast.