Mizuno JPX 919 Hot Metal Iron Set (Used)Mizuno JPX 919 Hot Metal Iron Set (Pre Owned) The Mizuno JPX 919 Hot Metal Iron Set is a performance oriented game improvement iron lineup that blends forgiveness, distance, and solid feel. These irons are engineered to give golfers more confidence and consistency across a range of skill levels. The JPX 919 Hot Metal irons feature a high strength Chromoly face and body, which expands the sweet spot and increases ball speed across a larger area of the