Srixon Z-TX Driver Super Ti-X51 - Proprietary Low Density, High Strength Titanium Material allows for weight to be redistributed away from the face. Promotes a higher launch angle with less spin combined with maximum COR for greater distance. Twin Cam Sole - Strategically positions 11 grams of weight to the extreme perimeter of the clubhead to create higher MOI. This clubhead is extremely stable through impact and is fine-tuned to each loft offering. 6 Part Bulge and Roll Design - Patent pending design that controls side spin and launch angle better on off-center impacts. The 6-Part Bulge controls side spin while the 6-Part Roll controls launch angle, resulting in better controlled mis-hits. Design - The 460 CC shape profile was inspired by Srixon's Professional Tour Staff and meets their critical standards. The straight topline shape facilitates better alignment on every drive for added consistency.