Uni Knot

( Duncan Loop | Grinner Knot )

Animation: Uni Knot

Usage

The Uni Knot, also known as the Grinner Knot in the UK, is a versatile fishing knot that can be used for a variety of purposes, such as attaching fishing line to the arbor of a reel, joining two lines, or securing lures, snaps, and swivels to the end of a line. It is also commonly used for tying a fly to a tippet in fly fishing.

History

The Uni Knot, also known as the Duncan Loop, was named after its inventor, Norman Duncan. It gained popularity under the name Uni Knot when Miami Herald editor Vic Dunaway popularized it in his 1970 book "Baits, Rigs & Tackle", referring to it as the "Uni Knot System." Dunaway found it superior to the Clinch Knot for tying hooks to leaders and noted it could replace the Blood Knot for joining lines. It can also be used to snell a hook and attach line to an arbor.

Also known as

  • Duncan Loop
  • Grinner Knot

Strength/Reliability

The Uni Knot retains approximately 85-90 percent of the monofilament's breaking strength. Knot strength varies between different fishing line brands but basically the Uni Knot works well with all monofilament fishing lines.

Note

As with most fishing knots, remember to lubricate the knot while tightening. Lubricating the knot, typically with water or saliva, reduces friction as the knot is tightened, preventing heat buildup that can weaken the line. This is particularly important for monofilament and fluorocarbon lines, which can be damaged by the heat generated during knot tightening. Proper lubrication allows the knot to cinch smoothly and evenly, preserving the line’s strength and ensuring a more reliable knot.