The Uni Knot is also known as the Duncan Knot, after its inventor Norman Duncan, and as the Grinner Knot. It looks very similar to a Hangman’s Noose but has a totally different internal structure. It can be used to join two lines together, in which case it is called a Double Grinner or Double Uni Knot.
This knot is effective with braided and mono lines, and with enough practice it can even be tied in the dark. Recent testing has backed up claims by Uni Knot advocates that it holds much of the line’s strength, up to 82%. This is most likely to be true when it is used with a large diameter eye, but when it is used to join two lines, the breaking strain will be closer to 75%. Learn how to tie the Uni Knot following the 7 steps below.