Today, Ian is in the bay testing out the three new JPX 925 Hot Metal irons. JPX 925 Hot Metal: Core model. Technology for all-around playability and forgiveness. JPX 925 Hot Metal Pro: Hot Metal in a more compact package players profile. JPX 925 Hot Metal HL: Larger profile with higher lofts to help with launch. With the JPX 925 Mizuno continues to deliver exceptional distance, world-renowned Mizuno feel, and countless fitting options. Let's see how different these 3 new models conduct themselves during testing.