Fishing swivels? How would you use those? Dont they just let your lure spin freely?

I also looked into socket swivels but the smallest I could find anywhere was 1/4", if anyone knows a supply of 1/8" swivels that would be awesome but I dont think they exist.

I did find [link=http://www.gtcfalcon.com/TDSMJ1.htm]this[/link] site which I will probably revert to if I cant find anything else, its a little bigger than I would like but they look nice and I can get double and telescoping joints.