the present invention is a spine supporting system where a screw , with a head having an interior female thread , is attached to the spine . an interior bolt is temporarily held by the interior female threads of the outer cap , where the outer cap aligns the inner bolt with the interior female threads of the screw . the inner bolt attaches to the interior threads of the screw and the outer cap secures a support rod to the screw . the present invention allows the support rod to be secured to the screw in one step , using a single tool during an operation .