The Hands Back Hitter Pro- Model is built with a heavy duty adjustable frame. The same unit assembles for righties and lefties. It throws up ALL BALLS plastic and real for baseball and softball. The pitch height adjust in seconds. It comes with an extra string, 12 plastic balls, and a CD-ROM training disc. The patented pitching machine/ batting tee hybrid that controls the swing sequence for rotational hitters. Extremely durable and used from LL to D-1 Programs