The following tutorial shows the proper way to fasten two loops together.
Step 1
You need to have two lines with loops in the ends. This is useful for connecting a leader to a fly line or a tippet to a leader. A Perfection Loop or Surgeon Loop can be used. The loops shown in the photos are large for the sake of the demonstration. When fastening a tippet to a leader the loops should be as small as possible.
Step 2
Place one loop over the other.
Step 3
Pinch the two loops together between your thumb and forefinger.
Step 4
Take the end of the line you placed over the other loop and put it through the loop in the other line.
Step 5
Grasp the end of the line you put through the loop and pull all the slack through the loop.
Step 6
The two loops will inter-lock like shown in the picture.
Step 7
Grasp both lines and pull the knot tight.
