Callaway Diablo Edge Iron Set (Used)Callaway Diablo Edge Iron Set (Used) The Callaway Diablo Edge Iron Set is a forgiving, distancefocused iron set designed to help golfers hit more consistent shots with improved launch and accuracy. These irons feature a low, deep center of gravity that makes it easier to get the ball in the air and maintain carry distance, even on lessthanperfect swings. The perimeter weighting and undercut cavity design increase the size of the sweet spot, offering