Don't muscle the turn. Power it. Classen PowerSteer™ Aerators are the ONLY aerators that steer through the tines for non-stop (non-stress) unmatched productivity. Patented split-drive technology allows the engine to power the tines independently during aeration for fatigue-free steering and unmatched user comfort and productivity. Enjoy effortless end-of-row turning, aerate in tight circular areas and easily maneuver around trees, hydrants and other above ground obstacles.