This 21-inch (53-cm), steel-deck lawnmower is powered by a GCV160, 4-stroke, overhead cam Honda engine and includes many features that make it easy to use and comfortable to operate. The Roto-Stop blade brake clutch allows the lawnmower's engine to run without the blade spinning, meaning the operator can empty the grass bag or cross a gravel path without having to stop and restart the lawnmower. Honda's Quadra-Cut system, standard on the HRR2165VXC, uses twin blades and a special deck design to produce finer clippings. Finer clippings take up less volume, so the bag fills up less often, and the clippings decompose faster to fertilize your lawn.