The JPX921 Forged iron integrates the power of Chromoly into a full-body Forged iron for the very first time.
Initially applied in Mizuno's Hot Metal irons - Chromoly has made the cross over to a Mizuno's forgings with staggering results. The fastest ball speeds Mizuno has ever produced from a fully Forged iron - a treat for both the senses and the scorecard. Grain Flow Forged in Hiroshima Japan.
A wider back milled slot increases stability from off centre strikes – from a smaller clubhead. Chromoly 4120 allows a clubface upto 0.5mm thinner for our fastest peak and average ball speeds from a full body Forged iron (4-7 iron). Additional perimeter weighting with toe bias for stability from off centre strikes.