The Srixon Z-STAR driver features the STAR Fitting System(TM) which enables you to independently adjust face angle and the internal weighting of the clubhead. The face angle adjustment helps you produce more accurate shots. Fine tuning the internal weighting with the different weight options will optimize your desired ball trajectory and swing weight. The STAR fitting system allows up to 84 possible configurations per loft offering for the ultimate in custom club fitting. The Z-STAR driver also features Starburst(TM) variable face design, which enlarges the driver's high COR area by 5 percent, providing added distance and forgiveness. This new driver features a Miyazaki(TM) Dromos(TM) shaft, which is the first premium custom shaft designed specifically for adjustable clubs.