"The MCI (Metal Composite Irons) series features Metal Composite Technology, which synthesizes industry-grade steel and graphite into one revolutionary composite shaft for even weight distribution and a perfectly balanced swing.スペックModelFlexLengthWeightTip FlexButt FlexTorquePar. TipButt DiaBend PtSpinLaunch60R40-35.56555673.02.5.591ML/ML/M60S40-35.56753623.02.5.595ML/ML/M80R40-35.58455602.72.5.591ML/ML/M80S40-35.58652552.72.5.595ML/ML/M100S40-35.510447482.62.5.595ML/ML/M100X40-35.510645432.62.5.599ML/ML/M"