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. Features: FORGED IN HIROSHIMA JAPAN - Grain Flow Forged HD at our legendary facility - for an identifiable and unsurpassed Mizuno feel. FASTER FORGED FIRST - Chromoly 4120 allows a clubface up to 0.5mm thinner for our fastest peak and average ball speeds from a full body Forged iron (4-7 iron). SLEEKER COMPACT PROFILE - A shorter blade length throughout, beveled training edge and reduced offset. CNC BACK MILLED - A 6.4% wider back milled slot increases stability from off center strikes " from a smaller clubhead. PEARL BRUSH FINISH - Anti-glare to minimize distractions over the ball.