Came across P-line swivels a few months ago and started using them. The cost about the same, or maybe a little less than Berkely swivels, much less than S-Pro, and seem better than the run of the mill swivels from Wally World and other places. They come in several sizes, though maybe not as many as Berkeley. But, they are smoother and better constructed in my opinion. The wire doesn't have exposed wrapping around its shaft and te P-line's look smoother and made better. Just thought I'd give a heads up.