Cobra king f7 one length 7 piece iron set this cobra king f7 one length 7 piece iron set offer a simpler easier way to play thanks to all golf clubs being the length of a 7 iron whilst the heads have been re engineered to ensure proper geometry to deliver optimised trajectory and distance gapping from long irons to wedges these golf clubs allow you to use one swing for all of your shots which helps provide greater consistency whilst the pwrshell face enlarges the sweet spot for greater for