Regular Flex. In 1956, Wilson introduced the original Dynapower irons and an innovative approach to weight distribution that revolutionized the game. Nearly 70 years later, the all-new Dynapower iron is redefining distance again. Using exclusive Dynapower AI, Dynapower irons feature variable face thicknesses to make more of the clubface hot, especially center to toe where 85% of shots are hit, helping you shoot your lowest scores yet.