When Wilson brought out their D7 irons, it was a huge leap forward in game improvement technology for the company. This technology has been further enhanced with their new D7 forged irons with graphite shafts. These forged irons give a fantastic amount of distance with the help of both Power Hole and Power Chamber technology. The placing of the power holes on the base of the head has been specially made for the forged clubhead by allowing the face to deflect and give a greater contact time with the golf ball to ensure that you get maximum distance from the strike. The Power Chamber, together with the holes, have been filled with urethane to give fabulous feel at impact. This also cuts down on any vibration and makes a great sound when the ball comes off of the face.