Figure of Eight Knot

What is a figure of eight knot?

This knot is a general-purpose stopper knot. It replaces the common overhand knot in many uses. The figure-eight knot or figure-of-eight knot is a type of stopper knot. It is very important in both sailing and rock climbing and professional work at height technique as a method of stopping ropes from running out of retaining devices.

How to make a figure of eight. See video below.