Page 512 - Bob Holtzman "The Field Guide to Knots How to Identify, Tie, and Untie Over 80 Essential Knots for Outdoor Pursuits"

67. Constrictor Knot

Also known as: Gunner’s Knot

The Constrictor Knot is far more secure as a hitch than the closely related
Clove Hitch and is one of the best binding knots around. It excels in thin
line and makes a very effective seizing in the end of a heavier rope to
prevent unraveling. If pulled tight, it can be nearly impossible to untie.

Uses: heavy-duty hitch in thin line, binding, seizing
Pros: very secure; easy to tie; ends can be cut short

Cons: very difficult to untie

Instructions

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