● Intended (1) Learn to flex after the acceleration period (acceleration): Made of soft resin and the tip will come out delayed so you can feel the "pliing" unconsciously You can learn how to use your arms like a whip. By experiencing complex pitching movements imitate long arms, it also stimulates the nerves and gives the brain. This allows you to learn timing of pronation (pronation + inward / pronation). By conscious of the tip, you can understand the importance of creating a left wall with the right pitcher for a strong shake. Objective (2) Acquire a rotational exercise axis: In order to achieve the point of acceleration, you need to take a deep follow naturally, and you can capture a follow through that naturally wraps your arms around your core. Purpose: (3) Expands your range of motion on your glutes and hips: By combining it with hills and pedestals, you can experience a deep follow-thru experience. At that point, the weight of the tip stimulates the muscles of the buttocks and stretches when you shake. You can get a lower body of motion to ensure a large trajectory. Purpose (4) Measurement and objective initiatives: A simple measuring instrument allows you to manage by numbers. Increases motivation by observing the swinging of the players arms. You can practice your numerical discretely at home. Just foam-checking shadows instead of targeted practice. Includes 4 and 4 pages of illustrative instructions (English language not guaranteed). Lightweight so it is recommended for beginners and boys, but it is also good for practice at the speed training part when released (ball action tip) regardless of age. It can also be combined with a professional 23.6 inches (60 cm) version to promote nerve development. Call and email advice service available upon request.