Hayter RTZ420H, 42" recycling mower for larger grass areas where manoeuverability is an issue. These machines are kown most commonly as zero turns because of their manouverability. These machines are designed for frequent use to mulch grass rather than collect. The machine is driven by two hydrostatic motors on either rear wheel, the machine is then steered like a tank powering the wheels indivivdually, making the machine very manouverable arround trees and flower beds. The machine is powered by a Kohler 19hp engine giving it plenty of power. These machines have been used for a long time in the USA and are now taking off over here.  The big advantage is the ability to cut without collection as long as the grass is cut offen doing away with the need for large piles of rotting grass, and saving a lot of time.