The 2017 Great Big Bertha Epic Driver from Callaway Golf is so-named because it represents an Epic shift in how the head and face behave to enhance power; spearheaded by Callaway's innovative Jailbreak Technology and Exo-Cage/triaxial carbon construction. Any golfer, from scratch players to high handicappers, will find more speed, distance and control with the GBB Epic. At impact, a driver�s crown, sole and face each bend, flex and rebound. Jailbreak positions two ultra-light (3 gram) and ultra-strong titanium bars behind the face, connected to the crown and sole. Jailbreak bars reduce crown and sole deflection, allowing the face to take on more impact-load to focus more energy - physicists call this energy lensing - across more of the face to promote longer average distance from swing to swing. It's all highly technical, we know, but it means you'll bomb it off the tee consistently and hit more fairways, too. Isn't that what matters? Standard Callaway warranty applies. Shaft and grip customization is available. Headcover and wrench included.