The perfection loop is multi purpose. It can be used to make loop to loop connections as per use in fly fishing. In such an application no hardware is attached and consequently the above link is not particularly useful in our discussion and may serve to complicate matters for those who might try their hand at the knot.

It is easily tied. Be sure to make use of your thumb and forefinger as a "clamp" of sorts. The clamp is employed twice. Once in the initial stages of the knot when the initial loop is made. And again after going around the thumb and then downward in front of the initial loop. It is at this juncture you may release the knot having captured it (clamped).

Then you can enlarge the loop to be able feed the hook or swivel through the original loop. Adjust the size of the loop you want with the tag end but you must tighten the main line only to secure the knot. It is not called the perfection loop for nothing. You may trim the tag end as close as you desire.

This guy makes it look easy (and it is ;) )
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