The Callaway Diablo Black Tour Driver is configured to deliver unmatched power through superior design. It features forged composite in the crown which contains 10 million turbostratic carbon fibers that reinforce 33% of the clubhead and allows Callaway's engineers to precisely control thickness like never before, resulting in a clubhead that is lighter but still has an extremely high Moment of Inertia. This lighter clubhead enables a longer club configuration, creating faster head and ball speeds than the Diablo Edge Driver. It also features Hyperbolic Face Technology, which is a chemical milling process that selectively removes excess material for precision thickness control across the face, producing consistently high ball speeds for long distance. The premium Physical Vapor Deposition (PVD) finish comes from a high-tech process that produces a stealthy and distinctive look for reduced glare.