The new AC by ACCRA shaft incorporates many of the best technologies that have been used in popular ACCRA shafts on professional tours during the past several years. AC by ACCRA incorporates many of ACCRA's latest technologies as well, once a club fitter determines which flex is best for your swing, any golfer can then be fit for an AC shaft with the weight most suitable to their swing. Flex will remain consistant as the golfer determines weight and launch.