Pro Tour Spec H.I.T. Technology stores more energy during the downswing, releasing that energy right before impact, accelerating the tip end of the shaft faster to the ball, providing optimal spin Designed for the stronger swinger who can benefit from a low to mid launch and low spin Install only golf shaft: Free Installation! Includes: reshafting fee (Free), custom assembly (Free) and any in stock OEM adaptor (Free). Trimming Instructions