KIREDAS is an innovative Japanese baseball throwing trainer, which allows you to feel the changes in the "release point" and "energy transfer” in ONE day. If you throw only with your arm, or adjust the release angle with your wrist, it wont fly straight and far. If it flies properly, it means you are throwing with an appropriate release point and energy transfer. Improvement can be seen quickly because you only have to focus on simply flying it straight and far. You will feel the difference! http://kiredas-us.com/