Introducing Core Blue by Rapport Golf. The perfect balance of high performance, consistency and reliability. Each shaft is specifically designed utilizing our Zone Frequency Profiling technology that optimizes shaft frequency, weight, torque, profile, launch and spin, to help each golfer hit it as long, as straight and as consistent as possible. The Core Blue line has options for every golfer ensuring the right fit. Fit & Design: Counter balanced design with higher balance point slightly reduces swingweight and is ideal for todaya (TM)s modern driver lengths CB (counter balanced) design feature creates potential for increased club head speeds and improved control 100% frequency tested in both 0Adeg and 90Adeg planes Utilizes the same zone frequency profiling technology as the rapport core blue wood shafts, providing optimal launch, spin and ball speed for each flex and weight option Flex and weight of each shaft are designed with unique launch and spin characteristics to fit the players individual swing profile