The Mizuno JPX 921 Hot Metal is a perfect iron for high handicap golfers. This iron falls into the category of game improvement with a very large cavity back as well as additional offset to the face. The hot metal irons are perfect for giving more forgiveness and distance to a higher handicap golfer. The Hot metal pro however, is an even larger head and more forgiveness which falls into the super game improvement category. , The size of the sole is the main difference between the Hot Metal and the Hot Metal Pro. The Pro variation uses the same components and is built similarly, but it has a shorter blade length, a topline that is somewhat thinner, less offset, and a sole that is significantly narrower. , Intro: This will answer the difference between the JPX hot metal and hot metal pro irons
Answer: The JPX 919 Hot Metal Pros are more compact and have less offset within their hosel than the JPX 919 Hot Metal irons.
Conclusion: The Hot Metal Pros are more compact and have less offset in the hosel than the standard hot metal Mizuno irons.