must be generated by the flightings thereby enabling the smaller flightings of the present invention to be utilized if the slope of the conical portion is steeper as in some prior art devices the flightings must generate more downward force in order to move the device through the ground and outwardly compact the soil in a shorter distance under these conditions the smaller flightings utilized in the present invention would strip out the soil and spin uselessly in the hole prior art devices made the mistake of overcoming this problem by making the flightings larger so that they could produce more force prior art designers also had the mistaken belief that large flightings would provide a stable base for the device however as noted above large flightings have the detrimental effect of disrupting the soil in a large area surrounding the device as it moves into the ground producing a less stable anchor therefore reducing the diameter of the flightings to a diameter less than the outside diameter of the upper housing portion and decreasing the slope of the conical section to less than 20 degrees produces the unexpected result of a more stable anchor thus the present invention provides the dual features of 1 disrupting the soil only within the diameter of the device itself and 2 gradually compacting the disrupted soil outwardly.