Loop Knot for Fly or Spoon / Spinner.

     
         
This is a simple knot that can give a fly or spoon more articulation / movement when fishing. When larger flies are fished tied directly to flurocarbon or mono sometimes they will lack movement due to the thickness of the line but a loop knot will give plenty of movement to the fly as it is not restricted by a direct knot, this is especially useful when using flies with short tails.