True Temper AMT Red R300 Steel Iron Shaft Tip Size: .355 Taper Weight: 94-106g Launch: High Flex: R-Flex AMT Red is the lightest weight and highest trajectory/spin option in the AMT range. Out of the AMT range, AMT Red maximizes speed and launch most by utilizing a responsive tip design and maintaining a constant superlight weighting in 4-7 irons. Focusing more on precision and control from 8-iron through wedge, AMT Red is designed with Ascending Mass Technology—making each shaft progressively heavier by 3-gram increments as golfers move to shorter irons. This unique blend of superlight weighting in 4-7 irons and AMT weighting in the scoring clubs allows AMT Red to offer both power and precision.