The fundamental knot to learn when creating ties, it’s important to learn how to create a square knot well. It is a non collapsible knot, which means that when weight is applied on this knot, it doesn’t shift. This is important knot to learn as it is used to start many ties and to create suspension lines. Single column is a term that refers to the cuff, that in this video goes around the wrist. A single column tie can be used to encircle any part of the body.