STRAIGHTLINE RECIPROCAL ACTION - 2-Cylinder oversized common piston powers twin-drive vertically-engaged gears with synchronized strokes so smooth that the 2000 VA/DFgets lighter with use. Precision-built, the HUSTLER does almost anythingbut finish and paint the surface. Rugged, but almost delicate in performance. With VA/DF options it becomes the healthiest, most productive straightline available.