The long- and mid-irons are hollow, iron-type hybrids and feature a forged face insert that is welded to a stainless steel body. That allowed Mizuno to shift weight down and rearward to create a higher moment of inertia and a lower center of gravity. The result, according to the company, is higher-flying shots and more forgiveness. Half-cavity scoring irons, designed for better control and feel, complete the set.
Forged from carbon steel and designed for accomplished players such as staffer Luke Donald, these are the best-feeling cavity-back irons the company says it has ever produced. Reinforced areas in the head control vibration. The amount of perimeter weighting decreases moving through the set, making the long irons easier to hit and the trajectory on short irons more piercing.
JPX-825 PRO IRONS
By milling a pocket cavity into the four- through seven-irons, Mizuno created 17 grams of discretionary weight that was redistributed to the heel and toe areas of these forged irons, thus increasing forgiveness. The eight-iron through gap wedge have a full cavity design, but a slightly thicker face, to help create a more penetrating ball flight.
Designed for the mid- to high-handicapper, the four- through seven-irons feature a large pocket behind the face, a cavity-back design and an extremely thin face to increase ball speed and forgiveness. The company says the JPX-825 is the longest iron it has produced and that the COR number (the USGA's measurement of trampoline effect in the face) is comparable with a driver's. The short irons (eight through pitching wedge) have a more modest pocket and cavity-back shape for enhanced distance control.