Troy-Bilt TB340 195cc 21-Inch RWD 3-in-1 Self-Propelled Mower Powered by a 195cc OHV engine Equipped with a 21-inch Rear Wheel Drive Self-Propelled TriAction cutting system 4-in-1 capability Easily raise and lower cutting height with the single-lever height adjuster Built with an adjustable ergonomic handle for easy and comfortable operation