The Cobra Bio Cell Combo Irons are a progressive set with hybrids for long irons and pocket cavities for the scoring clubs. Designed with Bio Cell technology that enables more discretionary weight movement that creates a low CG and higher MOI for higher, Straighter golf shots. Equipped with tungsten weighted cells that are positioned at the heel and toe to increase the MOI for a faster force. The Cobra Bio Cell Combo Irons are great for Mid- to High- handicap golfers who are looking to gain the most possible forgiveness out of their clubs.