Mizuno JPX 921 Forged Golf Irons The Mizuno JPX 921 Forged Golf Irons integrate the power of Chromoly to give staggering results, fastball speeds, and a treat for the senses. Forged in Hiroshima, Japan Grain Flow Forged HD at our legendary facility – for an identifiable and unsurpassed Mizuno feel. Faster Forged First The Chromoly 4120 allows a clubface up to 0.5mm thinner for our fastest peak and average ball speeds from a full-body Forged iron. Sleek Compact Profile A shorter blade length throughout, beveled trailing edge, and reduced offset. CNC Back Milled A 6.4% wider back milled slot increases stability from off-center strikes – from a smaller clubhead. Stability Frame Additional perimeter weighting with toe bias for stability from off-center strikes. Pearl Brush Finish Anti-glare to minimize distractions over the ball.