The original theory came from Heddon lures with the treble hooks in the screwed in hardware. Problem was that bass would throw the hooks fairly easy. Started with just one splitring added to the hardware. Did it's job. Bass still unbuckle the hooks but with less percentage. Then decided two splitring chained together would do an even better job. Well it worked pretty well. Then along came those Excalibur rotating hooks and the splitring-swivel-splitring chain just went off like a bright idea. Rotating hooks need to rotate and a swivel will do just that. The effects were just as expected. Hooked fish percentage went way up and they were hooked much better than before. The application for it was up to one's expectation. It's only fair to say that not all lures will benefit, since the extension will tend to lead to hooks hanging up on each other. The following are samples of lures that have benefited from the splitring-swivel-splitring chain.
Heddon Wounded Spook.
Excalibur (Jimmy Houston) Super Spook Jr. and Rebel Super PopR.