Alpine butterfly knot
knot used to form a fixed loop in the middle of a rope
The alpine butterfly loop is a knot used to form a loop in the middle of a rope. Once tied, the loop will not shift up and down the rope. It is good for adding a stationary loop in a continuous piece of rope, without bending the rope.
![](http://up.wiki.x.io/wikipedia/commons/thumb/3/30/Alpine_butterfly_loop.jpg/220px-Alpine_butterfly_loop.jpg)
![](http://up.wiki.x.io/wikipedia/commons/thumb/f/f7/AlpineButterflyTwoTwistTyingSequence1200w.jpg/170px-AlpineButterflyTwoTwistTyingSequence1200w.jpg)
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