generally conforms to the cross sectional shape of the upper curved surface portion of the casing and terminates in lower edges 43 an inner pole 44 extends upwardly from the inner cap and is rigidly connected to the cap 42 in turn an outer cap or cover 46 is superimposed on the inner cap 42 and terminates in lower outside edges 47 which extend downwardly a limited distance beyond the lower edges 43 of the cap 42 a hollow pole 48 is rigidly fixed to the outer cap 46 and extends upwardly from the cap 46 and is slidable down over inner pole 44 claws or fingers 50 are pivotally connected to the lower edges 47 of the outer cover and are biased toward one another by spring members 52 to normally retain the cap 46 snugly against the inner cap 42 with the fingers 50 engaging the underside of the base 15 the setting tool is assembled as described in connected relation to the casing by pressing the setting tool 40 and specifically the outer pole 48 downwardly the spikes 24 will penetrate the earth with sufficient clearance for the fingers 52 to pivot outwardly once the spikes are set the outer pole 48 is drawn upwardly relative to the inner pole 44 causing the fingers 52 to diverge away from the casing sole 15.