Blackbird Swivels by Redwing Tackle are ultra light and super small, ideal for connecting leaders to the main line. Whether fishing for Steelhead, Bass, Walleye or other fresh water game fish, these are perfect for any light tackle application. These swivels are size nine and they come in packs of ten or fifty. These are very small but strong swivels. They measure slightly less than 5/16" in overall length.