TaylorMade Qi Max IronsTaylorMade Qi Max Irons Qi4D hybrids combine 450 stainless steel and an ultralightweight carbon fiber crown to create a design that helps you consistently hit your desired carry yardages while maintaining a steep landing angle, allowing you to hold the green. Benefits & Features: Our Most Complete Game Improvement Iron, Ever Qi Max irons bridge the gap between the distance and forgiveness you demand, and the superior sound and feel you desire