Stump grinders can be used by both commercial operators and home owners to remove stubborn tree stumps. A walk behind stump grinder is much cheaper & easier to use than hiring heavy plant machinery. A stump grinder uses cutting teeth to grind away the tree stump to ground level. As it cuts the stump is turned to sawdust which can be re-cycled for garden mulch. The Weibang Intrepid SG13 uses 8 hardened teeth powered by a Honda GX390 engine to cut down the tree stumps. The GX390 engines provide excellent performance with low fuel emissions & consumption. The Intrepid SG13 cuts above ground to 534mm & below to 229mm. Specifications Model: Intrepid SG13 Type: Stump Grinder Engine: Honda GX390 Cutting Depth Above Ground: 534mm Cutting Depth Below Ground: 229mm Cutting Teeth: 8, hardened steel Cutter Disc Diameter: 355mm Cutter Disc Bearing: 30mm Sound Level: 106d B (A) Weight: 137kg Warranty: Manufacturer's 5 year domestic, 1 year commercial