There's nothing flashy about the look of the new Callaway Hyper X driver, and that's the point. It's what's inside that makes this driver stand out. Behind the face of the club is an internal weight shaped like an "X."
The purpose of the weight is to create a high moment of inertia and help generate "higher ball speeds across the entire face" of the club. The club also features a special clubface, which the company has given the hyperbolic name of Hyperbolic Face Technology. So if you miss it off the toe or heel, the ball should still travel nearly as far as a solid shot. Callaway says it is the largest hitting area on any titanium driver the company has ever made.