Markwort The Perfect Circle Pitcher's Training Aid, 13 - 17-Inch Circumference
The Perfect Circle develops muscle memory for pitching a softball correctly. Helps pitchers to keep the bottom part of the circle in close to the thigh. Perfect Circle Provides instant feedback without the need of a coach watching. Elastic band holds a square cotton flap that fits around the upper thigh and extends out a few inches into the pitcher's release zone.