Putting Practice Tool This is a mirror-type putting practice tool (^-^) You can visually check if your eye line, shoulder line, face angle, etc. are correctly set up on the target line (˃̵ᴗ˂̵) This product is about 5mm thick, but by practicing hitting the ball, you can hit the ball at the height that catches the core of the ball, allowing you to hit a ball with topspin. 《How to Use》 Place the mirror surface up and set the U-shaped indentation towards the cup. Overlap both eyes on the black line on the ball line and address so that your eye and shoulder lines are parallel. By stroking from that position, you can putt correctly. It's also small enough to fit in a golf bag, making it convenient to carry. You can also check it a few minutes before your play. The material is plexiglass (acrylic), so it is lightweight and highly durable. Also, even if it breaks, it is different from a regular mirror, so it is safe for households with small children. I also have many other golf goods for sale. If you leave a comment, I can offer a discount and list them as a set, so I hope you will take a look (^_^*) 〓Product List〓 #kuu-shop Putter, Putt, Golf Ball, Competition