Product Description UST Mamiya shaft design engineers incorporated new modified tip stiff technology as the platform for this new V2 Tour Flight shaft . With recent USGA rule changes for grooves in irons, new higher spin golf balls have hit the market, and tour players are once again looking for a low boring ball flight to maximize distance. And as with all Proforce designs, the unique torque to stiffness ratio creates greater accuracy with every shot. In honor of the original tip stiff Proforce GOLD, this V2 Tour Flight model wears the famous Purple and Gold colors. Click here for more information on Swing Speed Recommendations, Swing Weighting and Tip Trimming.