Double Uni Knot

The double uni knot, also known as a double grinner or uni-to-uni knot, is a widely used fishing knot for joining two fishing lines together. Some anglers find it easier to tie than the blood knot making it a great choice for a beginning fisherman. Plus, if you already know how to tie a single uni knot, learning the double uni is easy!

Use Cases For The Double Uni

The double uni is a common knot for attaching leader lines to your main fishing line featuring a low profile that will pass smoothly through the guides of a rod having little impact on casting distance. It can also be used for attaching backing line onto a baitcaster or other fishing reel.

How To Tie A Double Uni Fishing Knot

  1. Overlap the ends of each fishing line to be joined, bringing each end of line past each other about 8 inches.
  2. Take one of the fishing line ends and double back, forming a loop.
  3. Wrap the tag end around both fishing lines by passing it through the loop 3 to 4 times.
  4. Congratulations, you've just tied a uni knot! You can pull the tag end to tighten the knot onto the standing end of the other fishing line.
  5. Repeat the steps with the other fishing line.
  6. Once you have tied the two uni knots, slide the knots together and tighten them by pulling the two standing lines away from each other.
  7. Trim the tag ends close to the knot. You've just learned the double uni!

Double Uni Knot Strength

The double uni knot has a breaking strength of 90% making it an excellent choice for attaching two lines.