A new era of irons is born optimum performance in each iron is achieved through the creation of the ultimate progressive set multiple advanced construction techniques are incorporated throughout the set to create more feel distance control precision and forgivenesstecflotm construction a full hollow design with face insert in the long irons 3i 5i delivers low cg with and a highly responsive face for easier to hit higher flying long irons a half hollow design in the mid irons 6i 7i pro