Callaway Diablo Edge Tour Driver Fused Titanium.The 4-piece modular design produces the most weight efficient titanium 8.5 Driver Callaway . Each part is precision formed and fused, allowing weight to be positioned optimally for distance enhancing, penetrating ball flights. Chemically Milled Hyperbolic Face Generates Callaways most consistently high ball speeds ever by using a chemical reduction process to selectively remove unwanted material for precision thickness control. Aerodynamic Body Design The refined head shape optimizes all edge transitions to reduce swing drag up to 8% vs. other 460cc 8.5 Drivers for higher impact speeds and longer distance. Aldila Habanero Shaft High performance graphite shaft provides incredible feel and performance and is engineered to be the ideal complement to the Diablo Edge 8.5 Drivers.