Devices for excluding aneurysms and treating atherosclerotic disease, for intra-aneurysmal occlusion; and devices for preventing distal emboli. A method for defining both the MP and the STO stack geometries in a single step is also described. A key member provides additional information with respect to the relative orientation between the golf club head and the shaft. The claws can elastically pivot about the bridge when the terminal expansions are squeezed together or forced apart, allowing insertion of and securing the magnet assembly, respectively. Brackets are attached to the back and side walls. The retrieval determination may be based on a plurality of policies.