Training practice tool with a handle. Using this, I learned the external and internal rotation of the throwing motion, and my ball spin rate improved. But first, start with the extension of the pivot leg in the lower body! It's pointless if abdominal pressure is lost during the throw, so it's a no-go to focus only on the arm with this gear!! - Brand: progressGear - Color: Black - Features: Training equipment - Design: With handle Thank you for viewing.