Rethreaded Alpine Butterfly Knot
The re-threaded Alpine Butterfly knot is a very useful in-line, low-gain knot for direct tie-ins to closed objects.
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Fast Fours Mechanical Advantage System
The Fast Fours is a simple variation on a standard set-of-fours. The difference is that the far end of the rope is not terminated on the becket of a pulley. Instead it is run through another progress