Features and Benefits: Hustler Straightline, reciprocal action * The only 2-Cylinder, common piston straightline with vertically-engaged, twin-drive gears * Lack of rolling gears common to all other straightlines eliminates humping and jumping at the end of each reciprocal stroke * Two in-line cylinders, micro-honed to eliminate cylinder-wall drag, power an oversized high-alloy piston * Double rack and pinion gear assemblies give twice-normal gear contact for maximum balance and thrust