When looking at producing more club head speed, a light grip can be very, very important. But not many people really understand why. When you grip the club very tightly, it isn't as easy to hinge the wrists on the way back and on the way through. With a very tight grip as you move back, you want to be seeing those wrists hinging, but as you're gripping on tighter and tighter, it's quite hard to set the club into that position. If you have a very, very light grip and you're hardly holding on to the club, it becomes all of a sudden exceptionally easy to get those wrists working in whatever order, in whatever shape that you want to see.
The reason that's important for a long golf shot is as these wrists hinge up, is they set into a lever. Now levers throughout the golf swing produce power. If you hit a golf shot with absolutely no wrist hinge on the backswing and swing through as hard as you can go, it will be no way near as much distance as you can produce if you add in wrist hinge to the backswing. As you move down through the point of impact maintaining those angles, and then releasing them as you move through the ball will add club head speed. And that is only possible when your grip is nice and relaxed. Give that a go, experiment, hit eight irons, five eight irons each one gripping very, very tightly, the other nice and loosely. And just try and see the difference that you will have with the wrists hinge and the backswing. I can guarantee you will hit it further with a nice relaxed pressure.