Srixon’s goal with the Z 355 Iron set was to bring consistency and distance to the average golfer. To focus on Game Improvement Srixon’s Action Mass Technology and their Tour VT Sole are the main elements that deliver such performance. The Action Mass Tech is essentially the combination of a heavier head weight and a high balance point shaft, which delivers the stable swing and stable impact that, makes these so consistent. The Tour V.T Sole is shaped like a V for more consistent turf interaction on every shot. In addition, the Z 355 set itself is a split set where the 5-7 Irons feature a two piece design constructed with a HT1770 Maraging steel face and a 17-4 Steel body, whereas the 8 Iron through the approach wedge is one piece design constructed with a soft 431 steel.