I can't see any use for it. It seems to me the swiveling feature, though a boasting point at times, would cause headaches when rigging, as the lines could twist and foul. I'd also have a hard time trusting that with a 500# load. After all the time spent talking about kind rope bending angles, they market something like this with about as sharp a bend as one could imagine, and for load-bearing at that. Of course the bend is not in a mobile section of the line, but that bend does not look rope-friendly to me. What do they rate it at?