diameter 14 as shown in fig1 and 3 in a preferred embodiment the top annular surface comprises a first groove 17 extending across the diameter of the top annular surface as shown in fig3 in another preferred embodiment the top surface comprises the second groove 19 extending across the diameter of the top annular surface and oriented perpendicular to the first groove as shown in fig3 in other embodiments the top surface can be shaped and sized to mate with a wrench applicable shapes include a square and a hexagon an open end or box end wrench can be used to apply torque to the outer conical member in order screw it into or out of a bone the outer conical member further comprises a second end region 16 opposite the first end region as shown in fig4 screw like threads 18 are mounted on the conical member as shown in fig1 the outer conical member further comprises a central channel 20 extended longitudinally through the entire length of the conical member as shown in fig4 in a preferred embodiment the threads are large enough to purchase cancellous bone in a preferred embodiment these threads have a spread of 5 u2013 6 millimeters the invention further comprises an anchoring member 22 rotatably attached in the central channel this rotational affixation.