Callaway Big Bertha 2007 Fairway Wood. By adapting modern driver head features to Callaway's new range of fairway woods, the Callaway Big Bertha 2007 fairway wood has been created with larger head volumes and shallower face designs resulting in increased forgiveness and confidence at address. The Callaway Big Bertha 2007 fairway Woods feature larger head volumes for increased the Moment of Inertia by reducing twisting on off-centre hits, resulting in straighter shots. Modified Consistent Alignment Sole - the clubhead rests on two distinct areas of the sole, eliminating the tendency of the head to rock back and forth, helping ensure that shots start on-line. It also provides improved turf interaction from a variety of lies. Patented Callaway Golf Core Technologies VFT Technology maximizes ball speed and perimeter weighting for more distance and forgiveness while the unique S2H2 shaft system increases discretionary weight by removing it from the hosel and repositioning it in the perimeter of the clubhead. The longer face from heel to toe increases MOI while the lower leading edge increases confidence at address.