A spinal stabilization system is disclosed. The spinal stabilization system can include at least one anchorage component and a surgical rod. The anchorage component has a superior end, an inferior end, and an axial passage therebetween. The surgical rod is configured to be installed at least partially within the axial passage of the anchorage component. The surgical rod includes an elongate body having a first end and a second end. The first end or the second end is adapted to engage the superior end or the inferior end of the anchorage component. Further, the surgical rod is configured to substantially constrain rotational movement within the anchorage component.