Product description: [Recommended points] Comes with a mirror so you can check your putting posture, eye line and shoulder lines. The compact size allows you to practice anywhere in your home, such as hallways or parks. Effective for practicing positions where you put action Simple design allows you to easily practice the correct address at home. Can be used by both beginners and golfers alike. How to Use: (1) Match the main unit toward the target (Cup). (2) Place the ball on the U-shaped part of the body. (3) Peep the mirror from the top. (4) Align both eyes with the black line in the center. Align both shoulders with the red line in front. (6) Set the putter vertically to the ball. (7) Hit the ball with the lead without changing the face face. Size: Approx. 5.9 x 12.2 inches (15 x 31 cm); Material: Main body: Acrylic, Glass surface: Plexiglass (ball not included).