The Axis is a compact, spin-balanced single wheel design that is a consistent performer. The ATEC patented Center-Of-Gravity design allows quick and effortless pitch selection as well as easy movement through fungo, line drive, grounder and fly ball drills. With an optional conversion kit, the Axis can switch from baseball to softball, or vice versa, in a matter of seconds! The built in LCD display gives instant feedback on the variety of pitches that the Axis can deliver. It?s especially useful for softball players, as it throws accurate drops, risers and curves from the proper perspective with reliable consistency.