Endorsed by Derek Jeter. The Pro Hit-A-Way Power Alley is the ideal development tool for coaches and kids. 360º rotating base simulates wide range of inside, outside and strike zone pitches in the horizontal plane. Full 14" of vertical adjustments for high and low pitches in the vertical plane. Extending arms ensure plate stability. Durable materials stand up to hundreds of practice hours. Full size base helps develop home plate recognition. Adjustable telescoping tube quickly scales between 22"-36". For ages 7 and up.