auto flex driver shaft SF505 with Titleist Adapter. Golf Pride grips (color may vary) Independently tested and verified. Golf Pride grips (color may vary) If you want a different shaft adapter and or grip change available for an extra charge. The SF505 is recommended for players with club head speed between 90-100 mph https://www.golfwrx.com/661724/the-game-changing-autoflex-shaft-a-year-in-review/ Auto Flex shafts and their “KHT” (Korean Hidden Technology) are much lighter than other shafts with equivalent shaft flex. This greater flexibility and lighter weight produces less CPM, or “cycles per minute.” CPM is a measure of how the golf club shaft oscillates through the swing and contact. When the golfer swings the club, especially through transition, on the downswing, and on contact with the ball, higher CPM ratings result in a club that is less consistent. Autoflex golf shafts, with their remarkably low CPM ratings, are extremely consistent, enabling longer, straighter, more accurate drives. This is because the higher the CPM rating, the more the club head wobbles. Even a little bit of “wobble” can produce off-center strikes that rob the swing of power and accuracy. These shafts are Game Changers!