Endurant II Stent Graft System is used to repair the weakened and raised portion (aneurysm) of the abdominal aorta (the largest artery in the abdomen). The stent graft is placed with delivery catheter. In some anatomically challenging patients, the Heli-FX EndoAnchor System can be used in conjunction with the Endurant II Stent Graft System to secure the stent graft in place. The Heli-FX EndoAnchor System puts small wire coils into the artery wall through the top of the stent graft to prevent the stent graft from moving.