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How to Tie a Surgeon's Loop
The surgeon's loop creates a strong, permanent loop at the end of a fishing line — the standard terminal loop for loop-to-loop connections to fly line and leader.
How to Tie a Surgeon's Loop Step by Step
Step 1 of 5
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Written Instructions — Surgeon's Loop
- Double the line end Fold the line end back on itself to create a doubled section with a loop.
- First overhand with doubled line Treating both strands as one, tie an overhand knot — pass through once.
- Second pass — surgeon's step Pass both strands through the same loop a second time.
- Wet and tighten Moisten, pull loop in one hand and main line in the other to seat knot.
- Finished loop Strong permanent loop for loop-to-loop connections.
Tips for Tying a Surgeon's Loop
- Size the loop before tightening — it's very difficult to resize after the knot is tight.
- Two passes is the minimum. Three passes makes an even stronger loop.
- Unlike a perfection loop, the surgeon's loop is easy to tie in the field without a needle or tool.
- This loop is typically used for connecting to fly lines or as a loop for attaching snaps.
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