Tie a uni knot for an eyed hook or swivel

In this guide

1. Materials and suitable uses
2. Make the knot
3. Troubleshoot the wraps
4. A snug knot and a fixed loop are different jobs
5. Practice and progression

The uni knot, often called a Grinner, joins line to an eye. Its useful teaching feature is that you form the coil away from the tackle, then slide it down to the eye. That gives you a moment to inspect the wraps before the connection is fully seated.

Materials and suitable uses

Learn with monofilament, a smooth practice ring and scissors. The standard terminal version is also used with fluorocarbon when the line maker approves it. Braid recommendations differ between sources and products; use the braid manufacturer’s specified knot and wrap count rather than assuming this demonstration transfers unchanged.

Make the knot

1. Thread the tag through the eye, leaving a long working end.
2. Lay the tag back alongside the standing line so two parallel strands run away from the eye.
3. Curve the tag around to make an open loop beside the doubled strands.
4. Pass the tag through that loop and around both parallel strands. Repeat to make about six orderly turns for this monofilament practice example.
5. Moisten the line and pull the tag gradually. The turns gather into a short barrel around the doubled line.
6. Pull the standing line to slide the barrel toward the eye. Guide it gently and seat it without jerking.
7. Inspect, pull-test safely and trim, leaving a visible tag.

Troubleshoot the wraps

If the knot refuses to slide, check whether the turns have crossed or the tag has passed around only one strand. A loose loop beside the barrel usually means the knot has not fully formed or seated. Cut it off and rebuild it; do not fish with a shape you cannot explain.

A snug knot and a fixed loop are different jobs

This lesson finishes with the uni snug against the eye. A partly tightened uni can move under load, so do not treat it as the fixed open loop taught in the non-slip-loop lesson. Choose the connection for the lure’s intended action rather than leaving an unfinished knot to create movement.

Practice and progression

Make the first loop large and keep the working end long until your hands know the route. Use steady tension and a clear background so you can distinguish the two parallel strands. Once you can form the barrel consistently, the double uni becomes easier to understand: it uses two opposing uni knots to join lines. A successful hand check confirms only that your example held that check, not a universal strength claim.