Implant assembly and method for use in an internal structure stabilization system

An assembly for use in spinal stabilization procedures, comprising:

• a first bone anchor assembly comprising:
• a first anchor
• a first poly-axial head mated with the anchor such that the anchor is movable in relation to the poly-axial head, the first poly-axial head including a cavity;
• and
• a second bone anchor assembly comprising:
• a second anchor;
• a second poly-axial head mated with the second anchor such that the second anchor is movable in relation to said second poly-axial head;
• a slide ring rotatably mated in the second poly-axial head;
• a connector slidably mated in the slide ring along a distal end, and having a proximal end having an enlarged portion;
• wherein the connector is movable from a first position axially inline with the second bone anchor to a second position wherein the enlarged portion of the connector rests in the cavity of the first poly-axial head, and wherein the first position is used to implant the first bone anchor assembly, and the second position used to hold the assembly in a fixed orientation;
• and
• wherein the connector includes a drive mechanism mated to a drive mechanism of the second anchor when the connector is in the first position, the connector operable in the first position to transfer torque from a tool to the second anchor.