Constrictor knot
A constrictor knot is a type of knot that is tied around another rope. It is a secure knot, but it can be difficult to untie after it is tightened.
Constrictor Knot Media
Four steps in tying a en:Constrictor knot, en:ABOK #1249.
Four steps in tying en:Double constrictor knot (en:ABOK #1252).
Four steps in tying a slipped en:Constrictor knot, en:ABOK #1250.
A constrictor knot prepared for tightening using two metal rods and marlinespike hitches
Proper method of releasing (cutting) a en:Constrictor knot. (For the curious, the knife is a Chris Reeve small Sebenza.)
1 : Both hands holding the rope, thumbs are used to form a Z with the rope
2 : thumbs with the rope are rotated 90 degrees to cross each other forming loops
3 : The resulting two loops are folded around the crossing point and held together.
4 : the resulting two loops are slipped together over the end
1 : Bight turned into an underhand (overhand) loop and slipped loosely over the end of the object
