The constrictor knot is a very effective binding knot and was first termed by Clifford Ashley in his seminal work, “The Ashley Book of Knots“. Although Mr. Ashley implied that he invented the knot, further research has shown that the knot actually existed under other names many years before Ashley’s claim. Although I agree that the history of such things is important for posterity, the actual knot is where my interests lay and I will leave its origins for you to discover on your own.
The constrictor knot is easy to learn and remember which means you will have it at the ready when the need presents its self. The knot excels at binding several, especially cylindrical, objects together. It is tied in such a way that it binds upon its self. The tighter you cinch it down the tighter it holds. So much so, that once tightened it is very difficult, if not impossible, to untie. Often cutting is the quickest way to remove the constrictor knot.
The knot can be employed as a temporary whipping for multiple strand rope or to bind several strands of loose material, such as straw or twine, together. The latter application being where I employ the constrictor knot most often. I used it to bind strands of broom corn together when making my polissoir for instance. In tying several decorative knots, multiple strands of twine are employed and the quickest way of binding these is to use the constrictor knot.
Several of the knots that I plan to share in the future will begin by using the constrictor knot to bind several strands of twine together. That is why I am presenting it here. It is a knot that you, if you plan to follow along, will need time and again. Beyond that, it is just a handy knot to know how to tie.