Coil the tag end inside a loop, then slide the knot to the hook eye.
Also known as Duncan loop, Grinner knot.
The Uni forms a loop beside the standing line, then winds the tag inside that loop around the paired straight parts. Drawing the tag closes the wraps into a barrel, which can be seated toward the hook eye.
The inside-loop winding is the detail to watch. It differs from simply wrapping the tag around one exposed standing line. The same structure can be tied around a second line; two opposing Unis then make a Double Uni join.
When to use it
Attach fishing line to a hook, lure, or swivel.
Keep in mind
Moisten and seat the coils evenly before trimming the tag end.
Check your knot
- The tag winds inside the open loop.
- Each turn encloses the paired straight sections.
- The barrel seats evenly before the tag is trimmed.