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 and below to 229mm.specificationsmodel intrepid sg13type stump grinderengine honda gx390cutting depth above ground 534mmcutting depth below ground 229mmcutting teeth 8, hardened steelcutter disc diameter 355mmcutter disc bearing 30mmsound level 106db aweight 137kg warranty manufacturer's 5 year domestic, 1 year commercial