Constrictor Knot
Description
A famously tight binding knot that is difficult to untie once tightened. It is formed by tying a clove hitch and then passing the working end under the diagonal crossing.
Common Uses
Temporarily binding objects, hose clamping, whipping rope ends, securing bag necks, and general binding.
When to Choose This Knot
Choose this knot when you need a simple building block for practice, light utility work, or as part of a larger knot system. Basic knots are useful because they are fast to learn, but they still need to be dressed neatly and loaded in the intended direction.
Safety Notes
- Do not rely on a basic knot for life-safety, lifting, climbing, or rescue unless a qualified instructor has confirmed the complete system.
- Inspect the rope for cuts, glazing, stiffness, or contamination before tying.
- Leave an adequate tail and retighten the knot after the first load.
How to Tie
- 1Wrap the rope around the object to be bound.
- 2Cross the working end over the standing part to form a diagonal.
- 3Wrap around the object again, passing the working end under the diagonal.
- 4Pull both ends to tighten the knot. It will grip tightly and resist loosening.
Common Mistakes
- Using the knot because it is familiar rather than because it matches the load direction.
- Leaving a short tail that can creep back through the knot.
- Failing to dress the knot, which reduces clarity and can make inspection difficult.