When I try to know more about the X-24 hot irons, I found callaway's another irons, they are Diablo Edge Irons which callaway said are the longest stainless steel irons they have ever created,TaylorMade CB Irons so it seems that both the drivers mp600 and Diablo Edge Irons are the longest, but which are the real one ?Like the X-24 hot irons, the Diablo Edge Irons also have a low and deep center of gravity which make the sweet spot more accessible at lower impact location, then I think the more accessible sweet spot may be able to bring more distance and accuracy to us, and there are also more golfers agree that the Diablo Edge Irons have excellent distance control. But for me, I prefer the long irons, I think the long irons can give me more distance and forgiveness,ft iz driver and the mizuno jpx 800 ans Diablo Edge Irons are both good, but I want to know which irons are really the longest ?