These alloy tippet rings are of small size, very smooth, and they are seamless connectors between your leader and tippet.
First, tie one ring on the end of your leader, and then tie the tippet onto the ring.
These rings make the tippet changing and replacing easier without nibbling away at the leader.
SF tippet rings can be used on any leader system and are adapted to tying droppers. As the rings are very small and easy to lose, we consider and decide to sell them strung on a wire swivel.