What you can do with the Fujita Core Swing.
The core swing has 4 blades to increase air resistance and prevent it from swinging at hand.
It is that you will not be able to swing without the core of your body, so your natural core swing will be swinging big and faster.
The 4 blades are color coded in silver and black.The left side is silver while swinging and the right side is black so that the face rotation is naturally correct.Just shake it, you will get two elements needed to improve your distance.
In addition, we want you to try the barefoot swing after you swing the core swing.You can feel the head speed is up and you will feel the effectiveness.