As a preferred fitter for Callaway, we have access to the Tour model shaft cogs. This means we will be able to give you 9 adjustable settings instead of the normal 3. In addition, we have access to weight kits that allow us to make the head play heavier or lighter in order to control feel, shaft flex and accuracy. The RAZR Fit Extreme comes with a 13 gram weight in the heel and a 1 gram weight in the toe. This makes the driver play with a draw bias. So, if you like to tinker, tinker with new shafts and maybe even an extra one as we will have all of the special adapters to fine tune your game.