OVERVIEW: The Callaway Great Big Bertha 23 Combo Set features Callaway's Great Big Bertha 23 Irons and Hybrids Great Big Bertha reinvents the titanium iron. Callaway's first ultra-premium, multi-piece design combines driver power with iron precision to achieve a new level of speed, forgiveness and performance. A Forged Titanium face and body saves substantial weight to increase launch, with more flex at impact than steel and thinner face for greater energy transfer. The Tungsten Speed...