The clubs are one-piece Grain Flow forged at Mizuno’s iconic Hiroshima factory, which has been producing Mizuno irons since 1968, a process that gives you excellent feel as you play. JPX923 Forged has Chromoly Forging in the long clubs (J4-J7) which is a milled channel that widens towards the heel and toe, creating forgiveness and increasing ball speed. The short irons (J8-PW) have a more compact profile that generates more control on your approach shots. A generously rounded back edge gives the clubs versatility and optimal ground contact.
Thin Face, Forged from a single piece of 4120 Chromoly and back milled from heel to toe, it delivers extreme ball speed from a compact, playable profile. The face thickness is reduced to just 2.2 mm.
V-chassis, A new V-chassis allows for a thinner topline, using the Harmonic Impact technology to create a muscle back feel in a cavity back iron. Previous models needed a slightly thicker topline to maintain the feel.