No two golfers are alike and no golf shaft is one-size-fits-all. The SteelFiber FC "Flight Control" graphite iron shafts combine the advanced composite technology of SteelFiber with variable tip stiffness–delivering a higher ball flight in the mid and long irons while maintaining the classic SteelFiber launch in the scoring irons.TEMPOTempo is not how fast you swing it, it is how you swing it fast. Tempo will affect how you load and unload the shaft and is a big factor in which shaft will best suit you. A player with a quicker backswing and more aggressive transition will have a faster tempo, while a player with a slower backswing and smoother transition will have a more deliberate tempo.TRAJECTORYTrajectory is the flight of the ball and the peak height that the ball reaches. A player who struggles with getting the ball in the air should look towards a higher trajectory shaft, while a player who struggles hitting the ball too high should look for a lower trajectory shaft.SPINSpin is the amount of backspin that the ball has. The designs of certain golf shafts can promote more or less spin so keep this in mind when looking for a shaft to maximize your game.スペックSHAFTFLEXLENGTHWEIGHTTORQUETIP ODBUTT ODPARALLEL TIPBEND POINTSteelFiber fc70F442"75g3.2.370".600"7.5"ProgressiveSteelFiber fc70F342"75g3.3.370".600"7.5"ProgressiveSteelFiber fc70F242"75g3.5.370".600"7.5"ProgressiveSteelFiber fc80F442"85g2.9.370".600"7.5"ProgressiveSteelFiber fc80F342"85g3.0.370".600"7.5"ProgressiveSteelFiber fc90F442"95g2.8.370".600"7"ProgressiveSteelFiber fc90F342"95g2.9.370".600"7"ProgressiveSteelFiber fc90cw*F440"- 36.5"90g2.9-2.4.355".600"n/aProgressiveSteelFiber fc90cw*F340"- 36.5"90g3.1-2.6.355".600"n/aProgressiveSteelFiber fc115F542"115g2.8.370".600"7"ProgressiveSteelFiber fc115F442"115g2.9.370".600"7"ProgressiveSteelFiber fc115cw*F540"- 36.5"115g2.7-2.2.355".600"n/aProgressiveSteelFiber fc115cw*F440"- 36.5"115g2.8-2.3.355".600"n/aProgressive