The Albright Knot

The Albright Knot is most commonly used for joining monofilament lines of unequal diameters, for attaching fly line backing to the fly line, for creating shock leaders, and when a Bimini Twist is tied in the end of the lighter casting line. It can also be used for connecting monofilament to wire.

 
1. Bend a loop in the tag end of the heavier monofilament and hold between thumb and forefinger of left hand. Insert the tag end of the lighter monofilament through loop from the top. Pull the standing part of the heavy mono and the standing part of the light mono.
2. Slip tag end of lighter monofilament under your left thumb and pinch it tightly against the heavier strands of the loop. Wrap the first turn of the lighter monofilament over itself and continue wrapping toward the round end of the loop. Take at least 12 turns with the lighter monofilament around all three strands
3. Insert tag end of the lighter monofilament through end of the loop from the bottom. It must enter and leave the loop on the same side.
4. With the thumb and forefinger of the left hand, slide the coils of the lighter monofilament toward the end of the loop; stop 1/8" from end of loop. Using pliers, pull the tag end of the lighter mono tight to keep the coils from the slipping off the loop.
5. With your left hand still holding the heavier mono, pull on the standing part of the lighter mono. Pull the tag end of the lighter mono and the standing part a second time.
Trim both tag ends & you're done!