Callaway Diablo Octane Tour Driver Forged Composite: revolutionary new material that is lighter, stronger than titanium. Crown contains 10 million turbostratic carbon fibers that make up 33% of the clubhead. Allows our engineers to precisely control thickness like never, resulting in a clubhead thats lighter but still has an extremely high MOI Lighter clubhead enables a longer club configuration for faster head speed and ball speed for up to 8 additional yards over Diablo Edge Driver Hyperbolic Face Technology and chemical milling process selectively removes excess material for precision thickness control across the face. Creates consistently high ball speeds for long distance. Project X high performance 46 graphite shaft designed as the ideal complement to the Diablo Octane Driver. Maximizes performance and enhances feel.