The Srixon Z-355 iron set was designed with one objective in mind, consistency. They feature Action Mass Technology which puts more weight in the clubhead, plus an ultra-high balance point shaft, which helps increase ball speed and promote a more consistent, stable swing. The Z-355 iron set also features maraging steel face construction for powerful performance on all impact locations for exceptional forgiveness and feel. They also were designed with a Tour V.T. Sole, which helps tighten shot dispersion with less turf resistance through impact.