Uchida's Monster Slugger is a baseball training bat. Length: 65cm It has a structure where a weight moves and makes a sound at the time of impact. It helps you learn the ideal form and the timing of hitting by pulling the ball in with your body. Because it makes a pleasant sound like hitting a ball every time you swing, you can practice without getting bored and concentrate. It is said to be effective in improving your contact ability, stability of your swing axis, distance, and ball speed. Please understand that this is a used item. Please check the detailed condition from the photos. If you have any other questions or concerns, I will add more images, so please feel free to comment.