Designed by Former Major Leaguer Eric Rasmussen with the Help of Professional Hitting Instructors * Engineered to Develop the Hitter"s Swing to Produce Consistent Solid Contact and Backspin that Results in Line Drives * Proper Practice with the EquiTeee® Will Eliminate Hitting Problems Caused by the Uppercut Swing * Adjusts From 22 to 37" Height for Effective Use by Major Leaguers or T-Ball Players * EquiTeee® is Used by Many Major League Hitters to Improve and Maintain Their Swing