Fishing Knots
Surgeon's Knot
Double surgeon's
DIFFICULTY ●○○○○
Lay the two lines side by side and tie a double overhand knot with both at once. That's the entire knot — brutally simple and effective.
See it tied step-by-step ↗Why it earns its place
The fastest reliable way to join two lines, and it happily handles lines of different diameters where the blood knot gives up. A must-know for adding tippet in failing light.
Where it fails
Bulkier than a blood knot, so it can tick through rod guides. Both lines must cinch down together evenly — pull all four ends when tightening.
Quick facts
| Type | Line-to-line knot |
| Line | Unequal diameters OK |
| Strength | ~90–100% in light line |
| Best for | Fast leader-to-tippet joins |