Moderately reliable to secure a bag or a fraying rope's end.
Strangle Knot (Double Overhand)
Moderately reliable to secure a bag or a fraying rope's end.

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Uses: The Strangle Knot (ABOK # 1239, p224) creates a binding loop that can be used to tie the neck of a sack. It is essentially the same as the Double Overhand Knot (ABOK # 516, p 84.) as shown in the animation.
Alternative techniques: In addition to using the Double Overhand method as shown in the animation, the Strangle Knot can also be tied by Threading the End around a pole or rope.
Applications: The Strangle Knot makes a reasonably secure temporary whipping and can be used to secure the neck of a bag or sack.
Disadvantages: The Strangle is less secure than the Constrictor Knot and cannot be tied by just twisting a loop. In addition, there is a significant risk of it being laid down wrongly so that it only forms a half knot beside two turns (see the final frame in the animation).
Release: Like the constrictor, the knot can be hard to undo – a knife may be necessary. If so, the binding strand should be cut over the other strands to protect the underlying rope.
Rope Size: The pictures here show the rope tied in large diameter rope. This is only for the photography. It is normally tied in twine or other small diameter line.