Unique aluminium and polymer construction, Strong light weight aluminium skeleton chassis Auto drive for effortless propulsion . Can be used without collection bag as a rear discharge mower . Built with Briggs and Stratton engines for reliability, easy starting and low emissions . Front fins that noticeably improve the quality of cut and grass collection Full width ribbed rear roller . Rubber rimmed front wheels with ball race bearings Handlebars fold within length of machine requiring less storage space Smooth high impact ABS polymer underdeck for improved collection and reduced noise . 7 height of cut settings controlled by a single counterbalanced lever. Comfortable full width bail arm. Operator Presence Control for safe operation. Fabric grassbag can be lifted through the handlebars for easy emptying. 3 year warranty . Friction disc protects the engine crankshaft against accidental bending . Lifetime crankshaft guarantee