The Callaway Hawk Eye Pro Series fairway wood is a cast titanium club with a face that utilizes the VFT technology to increase ball speeds. VFT stands for Variable Face Thickness that consists of a thicker center portion that thins out towards the edge of the face. The result is a club that is right at the allowed COR value, a measure of how "hot" the face is. The Pro model is neutrally weighted for a more workable option for better players.