LAYERS OF FEEL Consistently Mizuno's 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. NEW V-CHASSIS ENABLES A THINNER TOPLINE Engineered via Mizuno's ‘Harmonic Impact Technology' project to create ‘muscleback' type vibrations and feel from a cavity design. Prior models required a slightly thicker topline to maintain feel. PRODUCT FEATURES SOFT COPPER UNDERLAY A mi