a breaking tool or a custom press so that flanges can be pressed to a generally perpendicular attitude relative to the base the tubular member is then welded to the base this method of manufacture is relatively inexpensive requiring little tooling costs and the resultant device is strong the device can then be coated for corrosion protection using appropriate coating methods referring now to fig8 10 there is shown another embodiment of the present invention post anchoring device 200 comprises a base member 210 having a plurality of holes 212 preferably countersunk to accommodate screws and an elongate tubular member 220 having a base end 224 and a terminal or cutting end 226 the device has connector means to enable the tubular member to be connected to the base member as described base member 210 comprises a surface contact or first side 230 and an opposite second or top side 232 and has a central bore 238 of slightly larger diameter as the external diameter of the tubular member thereby allowing the tubular member to be slid therethrough on the surface mounting side 230 of the base member and around the periphery of the bore 238 is provided at least one slot 242 that extends partially through the thickness of the base member but does not communicate with the top side 232 in other words there is at least one slot around the bore periphery on the surface contact side of the base member that does not pierce through to the top side of the base member the base end 224 of the tubular member 220 includes at least one.