The 2007 Callaway Big Bertha Fairway woods: Feature a stainless steel head, adapting modern head technology to fairway woods, with larger head volumes and shallower face designs for increased forgiveness and confidence at address. The larger head volumes of the 2007 Callaway Big Bertha Fairway woods increase the moment of inertia for less twisting, resulting in longer, straighter shots on miss-hits. A longer, shallower face creates a large effective hitting area, which helps to get the ball airborne quickly. The 2007 Callaway Big Bertha Fairway woods feature a Modified Consistent Alignment Sole, ensuring shots start on-line and providing improved turf interaction from a variety of lies.