10 stealth black swivels per pack. Designed and used by guides, these swivels are the easiest way to rig your leaders. We found the smallest and strongest swivels on earth (we haven&';t checked outside of earth yet, but we&';re working on it). They won&';t affect your casting or sink rate on your leaders. Lighter than the smallest dry flies and smaller than most nymphs, you won&';t find these swivels at your local bait/fishing store. These will not affect your casting or sink rate on your leaders. Small enough you&';ll never know it&';s there, and strong enough to hoist in just about anything you can stick a fly into. Small size used for 15# and under leaders and the nymph leader. Perfect for trout Medium size used for 20#+ leaders. Perfect for heftier specimens or fish that aren&';t shy. Perfect for Streamer, Nymph, or Dry Fly Leaders.