Simplicity 551M is a single-stage snowthrower designed for residential use. It's powered by a 7.5 hp Briggs & Stratton engine and features a 21-inch clearing width and a 12-inch intake height. The snowthrower has a 6-speed transmission and a variety of features to make snow removal easier, including an electric starter, heated handgrips, and a headlight. The Simplicity 551M is a great choice for homeowners who need a reliable and easy-to-use snowthrower to clear their driveways and walkways.