The all new callaway womens great big bertha driver is designed to get the most distance for all categories female golferthis ladies driver is a technological breakthrough that includes a multi material aerodynamic shape and a sliding weight so that you leave no yard behindto get every last yard out of your driver you need more speed thatrsquos why we put in our next gen rbullmoto technology it provides the structure for a thinner face leading to high ball speeds on center hits and of