The Mizuno MX Speed Metal irons are designed to blend explosive distance with forgiveness and control. They use a combination of advanced face engineering (multi-thickness CORTECH, seamless cup face) and vibration / sound tuning (Harmonic Impact technology with sound ribs) to maintain ball speed across the wide part of the face while giving a satisfying feel.Features: Multi-thickness CORTECH face - optimized to maximize ball speeds across more of the face, especially on mis-hits Seamless Cup Face construction - thinned areas around 360 of the perimeter to expand the effective rebound zone Harmonic Impact Technology with Sound Ribs - head geometry and ribs tuned for better feel, sound feedback, and overall impact sensation Enlarged COR / COR area - expands the efficient energy transfer zone to make off-center strikes more forgiving Who should add these to their bag?: Mid-handicap players who have somewhat consistent ball striking but want more distance without losing too much forgiveness Golfers looking for a distance / game improvement iron that still retains decent feel and feedback Players who miss center by small margins - those who want mis-hits to hold together better Those who value feel and sound - because the harmonic / sound rib tuning is part of its differentiator Players wanting a balanced set - for someone who doesn't want a pure blade or pure game improvement iron but something in between

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