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How to Tie a Constrictor Knot
The constrictor knot is one of the most secure binding knots ever devised — it bites into itself under load and becomes nearly impossible to untie. Used for bag closures, whipping rope ends, and temporary clamping.
How to Tie a Constrictor Knot Step by Step
Step 1 of 5
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Written Instructions — Constrictor Knot
- Wrap around object Pass rope around post/bundle with working end crossing over standing part.
- Second wrap crossing diagonally Continue working end back around, crossing over the first wrap diagonally.
- Tuck under diagonal Pass working end under the first diagonal wrap.
- Pull both ends Cinch down hard. The constrictor bites into itself and grips.
Tips for Tying a Constrictor Knot
- Plan before tying — this knot is usually cut rather than untied.
- A slipped constrictor (bight in last step) can be released with one pull.
- Extremely useful for whipping frayed rope ends in the field — grips so well it replaces a proper whipping.
- Use on hose connections, bag closures, and anywhere you need a grip that will never slip.
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