Batting Practice Equipment Baseball Heart Spin Stick This is the Spin Stick. Mid-size for batting 53 ~ 54cm, 1 stick Batting Amazingly improved! ★ Batting and swinging using the body's core My son had a bad habit of leaning forward when batting, and I tried various things. I don't think it's something you use every day, but I think it's a gem that reminds you of the importance of the body's core from time to time. After using it, the bad habit of lunging forward was corrected. - Model Name: Spin Sticks - Color: Black - Material: Rubber and Metal - Purpose: Training equipment