Callaway Ladies Big Bertha 2008 Driver. New for 2008 the Big Bertha is Callaways latest all Titanium has been designed specificall for the woman's swing. The smaller 440cc all-titanium head size reduces the Lady Big Bertha '08 Driver's overall weight, allowing for increased swing speeds and greater distance potential for women with low to moderate swing speeds. Strategically placed internal weighting is biased toward the heel, helping golfers close the face more easily at impact to promote a draw ball flight and reduce slices or fades. A longer shaft optimized to meet the modern woman's swing needs and height helps increase clubhead speed for higher ball speeds.