Retractable fixation device

A fastener for securing two members together through an aligned bore in the two members, the fastener comprising:

• a longitudinally extending body having at least one opening adjacent each of respective ends thereof, the body having a central bore hole, a threaded shaft concentrically disposed in said central bore hole and having opposite threads at each end, with a rotation applying member at an accessible end;
• a nut provided on each of said opposite threads in threaded engagement with the respective thread, at least one longitudinally extending deformable engaging finger coupled to each of said nuts and disposed adjacent a respective one of said openings;
• and
• the at least one finger being adapted to extend through the respective opening when said shaft is turned in a first direction to cause the nuts to move toward each other, thereby causing the fingers to engage, when the openings at each end are disposed in the aligned bore adjacent different ones of said two members to be secured together, with respective ones of said two members, thereby securing the two members together, said fingers each being deformable when extending radially through a respective one of the openings and adapted to penetrate into a respective one of said two members, each opening having a cam surface for engagement by the respective engaging fingers, the engaging fingers being directed along the cam surface at an angle away from the longitudinally extending body through the opening as the nuts move toward each other.