A method for facilitating the ordering of construction supplies by a customer over the Internet is provided. The return spring is disposed outwardly of the body. The legs desirably have a generally X-shaped configuration when the legs are placed in an upright position and the legs can be collapsed into a storage position. The first obstructing body is affixed against an inner surface of the wall of the blood vessel or body cavity and the second obstructing body is affixed against an outer surface of the wall of the blood vessel or body cavity once placed at the puncture or the opening.