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Super Useful Knot - How To Tie A Constrictor Knot

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Published on May 26, 2015

Knot tying video tutorial. Learn how to make a constrictor knot. Easy step by step instructions for tying a constrictor knot in this guide.

The constrictor knot is an extremely useful knot, which is another knot that should be more widely known and utilized. It is mentioned on numerous occasions in the Ashley Book of Knots (ABoK). Clifford Ashley recommends it for a multitude of purposes from whipping a ropes end to handcuffs to clamping a hose. Master rigger Brion Toss describes it as at least as useful as the bowline knot and "to know the knot is to constantly find uses for it."

It is in the category of binding knots and is very secure and easy to tie. It has a very strong clamping characteristic which gives it it's names sake after the snake. The boa constrictor. To get extreme constriction without hurting your hands it is often suggested to use a marlinespike hitch around a rod or other appropriate object and use those to pull hard.

It is tied very similarly to the clove hitch and if you look at the structure of the knot it has an overhand knot which is locked into place with a riding turn. This demonstration showed the knot tied with an end but it can also be tied on a bight.

related knots include: Clove hitch, transom knot, strangle knot, miller's knot, boa knot, cross constrictor knot double constrictor knot.

Uses: replacement for a zip tie. Handcuffs. In spearfishing to tie off speargun bands. Hose clamp. Binding bungee cord. Seizing a hole in a prussic loop to make the carabiner attachment more secure in climbing. Tying off a sack or bag like a millers knot. Tying off slingshot bands. Clamping pieces to be glued.

The main disadvantages of the knot is that it is extremely difficult, or often times impossible to untie. It also needs a curved surface to bind so it is not good for square or flat objects.

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