The Tour AD M9003 Shaft. These were made with 55t carbon fibre with the latest in graphite material and designed with a very stiff tip to mid section promoting a low/mid launch and low spin.
The Tour AD M9003 was designed for the low handicap and pro golfers with fast swing speeds of 105+ mph.
Stiff flex = up to 105mph
X-Stiff flex = over 105 mph