Cobra king f7 steel irons these cobra king f7 steel irons have been crafted with a pwrshell face which utilises a thinner stringer face and sole structure which has been engineered for speed whilst also producing a larger sweet spot for greater distance and precision so you can attack the pin in less shots than ever before the cnc milled grooves increases spin and optimises trajectory which enhances control and workability which gives you added confidence and the weight is removed from the