Knots you must know.

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1. Alpine butterfly knot

The butterfly loop, also known as lineman’s loopbutterfly knotalpine butterfly knot, and lineman’s rider.


for a secure loop in the middle of a rope when the ends aren’t free

This loop is used for a secure loop in the middle of a rope when the ends aren’t free.

2. Bowline.

 The bowline is well known as a rescue knot for such purposes as rescuing people who might have fallen down.

3. constrictor knot & Double constrictor knot

The constrictor knot is one of the most effective binding knots. Simple and secure, it is a harsh knot that can be difficult or impossible to untie once tightened.