There are three important technological features that make the XK Standard Fairway Woods as higher performance clubs. First, a variable face thickness was used to reduce the perimeter area of the impact area so the entire club face could be more active. This acts to increase the area of forgiveness over a larger portion of the face. Secondly, the crowns were constructed with exclusive VCT (variable crown technology) and measure as little as 0.5mm thick. All the unwanted weight normally reserved for the crown was repositioned deep within the head. Lastly, the wide profile increases the Moment of Inertia. All these features provide for a high launching ball flight with incredible accuracy.