The cobra max golf irons uses cobras new tecflo technology to create a set of irons that combine the ultimate progressive set of irons cobra have ever produced a multiple construction of half hallow design in the long and mid irons with a deep cavity in the short irons and specialty design in the wedges cobra has used top technology which is a engineered aluminium cap that replaces steel on the half hollow design club heads and free up five grams of weight so a lower centre of gravity can b