Callaway Diablo Edge Men's Golf Driver Standard version of Diablo Edge driver with core Callaway S2H2 technology with reduced weight hosel for better stability 4-piece fused titanium modular design delivers distance-enhancing, penetrating ball flight Improved aerodynamic design reduces drag in the downswing for higher impact speeds Chemically milled hyperbolic face cup improves impact efficiency and produces consistently high ball speeds Golf Digest Hot List 2010 gold medal winner