Golf lesson YouTuber Terayu recommends this grip correction iron. It's a 9-iron that allows you to hit balls while checking the correct grip shape. With this one, you can grip correctly and hit the ball right away. It has the unique feature of having finger-shaped indentations, allowing you to hit balls as a 9-iron. By using this Grip Sensei, which encapsulates the basics of the correct finger positions, grip direction, and grip fundamentals, anyone can achieve a perfect grip. Currently sold out product!!!! I've used it a few times, and the "9" on the head is slightly worn, but otherwise, it's in very good condition!! Since it doesn't have a box, I will wrap it in bubble wrap and ship it securely!!