The JPX921 Hot Metal irons pair Mizuno's fastest ever ball speeds with a piercingly straight ball-flight and controllable landing angles.

Faster Chromoly 4140M

• 3rd generation of designing and manufacturing irons using Chromoly – now taken to its limits. A re-engineered CORTECH face, is now 0.2mm thinner across the centre point

Seamless cup face

• A new variable thickness sole design allows the leading edge to act as a hinge, resulting in greater face flex and ball speeds

Harmonic impact

• Predicting vibration patterns dictated 3 additional sound ribs – producing a more solid sensation

Pearl brush finish

• Anti-glare to minimise distractions over the ball

Stability frame

• Extreme perimeter weighting with toe bias for stability from off centre strikes