You cannot swing as far as you used to at a younger age.
You want more distance off of your tee shot or more power from your full swings.
You want to gain more accuracy and distance.
You have been hitting the ball fat, topping, pulling, or slicing the ball and you need more power.
You want to gain a longer tee shot without having to make a more powerful swing.
Your flexibility has improved in the past year yet you have not gained much distance at all.
You are having difficulty releasing the golf club and gaining the distance you need.
You want more powerful drives.
You want to hit all of your long clubs a little further.
You try to hit the ball as hard as you can with every long golf club in your bag.