If you’re the best golfer, or just a regular golfer getting it around with a social group, great big distance gains are useful, great fun
and inspiring. The Great Big Bertha (GBB) Epic Metalwoods from Callaway make that difference as soon as you use them because a
technology leap provides so much more ball speed.     

When a conventional metalwood makes impact with the ball some energy is lost as the crown flexes upwards, and the sole flexes
downwards. The Callaway GBB Epic Head, on the right, has two titanium bars connecting crown to sole. That minimizes energy loss.
In fact it creates “energy lensing” to maximize energy transfer and ball speed.