Mizuno JPX 923 Hot Metal Golf Iron - Steel The Mizuno JPX 923 Hot Metal Irons have been designed to provide golfers with a set of Mizuno golf clubs that provide incredible ball speed and control with every shot while also offering amazing stopping power to keep your golf ball on the greens. Mizuno Golf has constructed these golf irons using a new 4335 Nickle Chromoly material in the design of the club head. This material has been used because of the additional ball speed that is able to be created due to the strength of the material being 35% stronger than previous iterations. The metal is also 8% thinner than previous designs which allows for much more energy to be transferred through to a golf ball for higher ball speeds that can easily be created.  For even greater ball speed the Mizuno irons use a new V-Chassis that allows for a much more solid vibration pattern for greater control, and the thinnest part of the sole on this club has been extended by 18% to be made winder. This larger area allows for much more consistent ball speed to be generated across the club face thanks to the high-energy area being increased.  Because of all of the speed that these Mizuno Hot Metal Irons are able to generate, plenty of focus has been made looking to increasing the stopping power for greater control. A seamless cup face has been used in the design to allow for a much deeper centre of gravity in the clubhead so that high launched shots can be created for a much more controllable landing angle to keep your golf ball stopping quickly on the fairways and greens. These golf clubs come with steel shafts that allows for greater durability and control on your shots so that you can continue playing for years with amazing accuracy. Features Faster Nickel Chromoly New 4335 Nickel Chromoly is 35% stronger than our original Chromoly, for an 8% thinner, high ball speed clubface. V-Chassis For More Solid Feel Mizuno’s new V-Chassis delivers a more solid satisfying vibration pattern, even though the clubface is 8% thinner Increased Stopping Power Seamless cup face construction delivers the deep centre of gravity needed for a high launch and controllable landing angle Consistent Ball Speeds Across The Face The thinnest part of the sole is extended 18% wider, creating a wider high-energy area Three Fitting Options – HM PRO, HM AND HM HL 175,000 real golf swings recorded via Mizuno’s Swing DNA system every year highlighted the need for variable launch options White-Satin Brush Non-reflective, Chrome plated finish to reduce bright light glare.