Big Bertha is one of the most iconic brands in golf history, so it is not surprising that the release of a pair of Callaway drivers bearing that appellation is creating some excitement. After all, it has been seven years since the company sold a product bearing that name. But this is not in any way an exercise in nostalgia. In fact, company engineers are touting these offerings – the Big Bertha and the Big Bertha Alpha – as technological breakthroughs. According to Luke Williams, senior director of global woods and irons at Callaway Golf, the new Big Bertha driver boasts four key features, starting with a sliding, 8-gram weight set on a 5-inch track on the perimeter of the 460 cc head that is designed to help players optimize shot shape and distance while controlling dispersion. A Hyper Speed Face is intended to enhance forgiveness on off-center hits, and an advanced adjustable hosel allows golfers to independently manipulate loft and lie.