Figure-of-eight knot

Canonical Name: figure-of-eight knot.
Variant Name(s): savoy knot, flemish knot, double stopper.

Category: stopper.
Origin: Ancient.
Similarities: stevedore's knot.
Releasing: Non-jamming. This knot can often replace an overhand knot
Efficiency: Unknown%
Caveat: None, secure if wet.
Uses: fishing, climbing
Comments:
Structure:
Tying:

A highly stable loop can be made by tying a figure eight knot in a bight of rope. This knot commonly used by climbers to tie themselves onto the main climbing rope. The loop can be made by tying a figure-of-eight so as to leave a substantial working end below it, threading the working end through a carabiner, and threading it back through the original figure-of-eight. (This method is called the figure-of-eight follow through[?].)

See also Figure-eight knot (mathematics).