This type of pitching machine utilizes two spinning wheels to propel a baseball or softball. The speed and trajectory of the pitch are controlled by adjusting the speed of the wheels and the angle between them. This design offers a realistic simulation of a live pitcher, allowing batters to practice against different pitch types, including fastballs, curveballs, and sliders.
The ability to consistently deliver various pitches at controlled speeds makes this particular machine design valuable for developing batting skills and improving reaction time. Its use ranges from amateur practice sessions to professional training regimens. The development of this machine type has significantly enhanced baseball and softball training by offering a repeatable and customizable pitching experience previously unavailable.