Mizuno JPX 923 Tour Iron Set (Right-Handed)Mizuno JPX 923 Tour Iron Set Consistently Mizunos most played iron model in professional golf and still one piece Grain Flow Forged in Hiroshima Japan, the JPX923 Tour adds a copper underlay for an even smoother sensation at impact. The JPX923 Tour also presents a narrower top line and sole in tandem with a more rounded trailing edge for cleaner turf interaction. Player enhancements were made possible through the introduction of Mizunos new V Chassis.