US Patent 9248324 Swivel D-ring attachment point

A first attachment portion has a first closed aperture defining a circular ring portion that extends over a first circumferential range of at least 180 degrees of arc that is symmetrically disposed relative to an axis. A second attachment portion has a second closed aperture. The first and second attachment portions are joined together so as to permit freely swiveling one of the attachment portions relative to the other around the axis. The second aperture has a shape that is substantially different from the shape of the first aperture, for connecting to substantially different articles.