Callaway Diablo Edge irons have been designed to be long, forgiving & give you a great feel on impact. The center of gravity has been lowered & deepened in the club head to that the sweet spot is located lower in the face. This is because the majority of miss hit are found on the bottom part of the face. The lower sweet spot will help with longer & more consistent shots. A solid impact sole also helps decrease fat or thinned shots for more consistent distance. The Diablo Edge irons are fitted with a uniflex steel shaft which are flighted. Flighted means that your long irons fly high for more forgiveness & ease of use, & you short irons fly lower for more accuracy.