Mizuno JPX 919 Hot Metal Pro irons provide a perfect balance of launch speed, distance, and launch with soft, controllable landing angles in a more compact shape. These irons are made with Chromoly 4140M, a highly resilient material that allows for a new multi-thickness face for incredible ball speed and feel. The new Stability Frame design is open in the heel portion to fine-tune sound and vibration while enhancing stability and launch. Re-engineered sound ribs are developed to hit specific vibration patterns to deliver a satisfying sensation at impact. A one-piece cupped face design offers greater feedback at high ball speeds for improved distance and feel. Chrome plating with a new, more durable pearl brush finish lasts longer and looks softer in the sun. JPX 919 Hot Metal Pro Irons are ideal for golfers who want it hit farther with high launch, combining all those distance benefits with a more compact look