Mizuno JPX 919 Forged 4-GW Iron Set w/ Dynamic Gold 105 Steel Shafts
Back Milled Face:
CNC milled from the sole up, the JPX919 Forged boasts a larger area of minimum face thickness for consistently increased ball speeds. Weight removed from face also allows a lower, deeper centre of gravity for more easily flighted long & mid irons.
The ultimate balance of ball speed, stability and feedback within a more refined playing profile.
A small addition of Boron makes a big difference:
Just a trace of Boron makes our steel billet 30% stronger, allowing greater design possibilities in a forged head.
Open at the heel portion to enhance stability, launch and loft appropriate flight apex for soft landing approach shots.
Chrome plating with a new more durable pearl finish to soften the 919s precise lines in high sunlight.
Grain Flow Forged HD (High density):
From a single billet of 1025B mild carbon steel in Hiroshima Japan for unmistakable Mizuno feel through impact.
"A deeper, wider milling across the back of the face makes the JPX 919 Forged able to transfer more energy to the ball than any previous Grain Flow Forged irons. None of that would have been possible without that small addition of boron into our steel billets - which gives that additional strength needed to reinforce the face."
David Llewellyn, Director of Golf R&D.