This set features wide soles, deep cavities, a slight offset, and Callaway’s VFT technology. These features combine to give these irons a high MOI (moment-of-inertia). Basically, the higher the MOI, the more forgiving the club is on mishits. By moving more of the weight lower in the clubhead and below the ball, it’s easier to get the ball airborne. Poor hits turn into OK shots. I’ve acutally hit the ground 3 inches behind the ball with a 4 iron from this set, and the ball still got in the air and went straight. It only went about 130 yards, but my playing partners just thought I was laying up. Besides that, I personally think these are the best looking Big Bertha irons yet.