What the non-slip loop knot does and when to use it
The non-slip loop knot creates a loop at the end of your line that won't tighten under load — the loop stays open and moves freely, which matters when you're attaching a lure, swivel, or hook. Unlike a regular loop knot that cinches closed when you pull hard, this one holds its shape. That free movement lets your lure swing and dart more naturally, and it prevents the knot itself from weakening your line where it bends.
Use this knot when you want a connection that moves. It works well for attaching lures to monofilament or fluorocarbon line, for creating a loop-to-loop connection with a leader, or for any situation where you need the knot to stay open under tension. Saltwater anglers often tie it for light tackle work; freshwater fishers use it for bass and pike lures where the extra movement matters.
The knot is stronger than it looks — when tied correctly with good line, it holds close to the line's full breaking strength. The key is keeping the wraps tight and the loop the right size before you cinch it down.
Key Takeaways
- The non-slip loop knot creates an open loop that stays open under load, letting your lure move freely instead of being pulled tight against the knot.
- Tie it by wrapping the line around itself four to five times, threading the end back through the first wrap, then cinching the wraps down while keeping the loop open.
- This knot works best with monofilament and fluorocarbon line; it can slip on braided line unless you add an extra wrap.
- Test the loop by hand before you fish — it should move freely and not tighten when you pull on the main line.
How to tie the non-slip loop knot step by step
Start with about 6 inches of line extending past where you want the loop to end. Hold the line between your thumb and forefinger, then wrap the working end (the short end you're holding) around the main line four times, moving toward the loop end. Keep the wraps loose and parallel to each other — don't let them bunch up or cross.
Thread the working end back through the first wrap you made, the one closest to the loop. Pull the working end snug, but don't cinch the whole knot yet. At this point you should see four wraps around the main line with the working end coming back through the first one, and an open loop above all of it.
Hold the loop open with one hand — keep it the size you want it to be — and pull the main line and working end together with the other hand. The wraps will tighten down around the main line. Keep pulling until the wraps are snug and the loop stays open. Trim the working end close to the knot.
The whole process takes about 30 seconds once you've done it a few times. Practice on scrap line first so you can feel when the wraps are tight enough and when the loop is the right size.
Why the loop stays open and what that means for your fishing
The non-slip loop works because the wraps cinch around the main line itself, not around the loop. The loop is formed above the wraps and stays separate from them. When you pull on the main line, the wraps tighten against the line but the loop doesn't collapse — it just sits there, open and ready to move.
That open loop gives your lure room to swing. A tight knot pulls the lure hard against the line, which dampens its action and can make it look unnatural in the water. With the non-slip loop, the lure can dart and wobble the way it's designed to. For crankbaits, soft plastics, and topwater lures, that difference is real — fish notice.
The knot also distributes stress more evenly. Because the loop doesn't collapse, there's no sharp bend in the line right at the knot. That means less wear and a stronger connection overall. The line bends gradually through the wraps instead of making one hard angle.
Line types that work best with this knot
Monofilament is the ideal line for the non-slip loop. The knot grips monofilament reliably and holds its shape. Most anglers who tie this knot are using mono, and it's the easiest line to learn on.
Fluorocarbon works well too, though it's stiffer than mono and the loop may not move quite as freely. The knot still holds, and many saltwater anglers prefer fluorocarbon for its invisibility and abrasion resistance, so they tie this knot in fluorocarbon regularly.
Braided line is slippery, and the non-slip loop can slide on braid if you don't add an extra wrap. If you're using braid, tie five or six wraps instead of four, or add a small overhand knot in the working end before you thread it back through the first wrap. Either method keeps the knot from slipping under load.
Common mistakes and how to avoid them
The most common mistake is cinching the knot too tight before the loop is the size you want it. Once you pull the wraps down hard, the loop size is locked in. If you pull too early, you end up with a loop that's too small or too large, and you have to cut the knot and start over. Hold the loop open with your fingers while you tighten the wraps, and only let go once the wraps are snug.
Another mistake is wrapping the line unevenly. If the wraps bunch up or cross over each other, the knot won't cinch smoothly and the loop may not stay open. Take your time with the wraps — they should lie parallel and side by side, like threads on a spool.
Some anglers tie too few wraps (two or three) to save time. Four wraps is the minimum for reliable hold; five is better if you're fishing heavy cover or large lures. The extra wrap takes five seconds and gives you real security.
Finally, don't assume the knot is finished just because it looks tight. Tug on the loop and the main line separately. The loop should move freely and not collapse when you pull. If it tightens, the knot isn't right — cut it and tie again.
Testing the knot before you fish
Before you tie this knot on your actual lure, practice on scrap line and test it by hand. Tie the knot, then hold the main line in one hand and pull on the loop with the other. The loop should open wider, not collapse. Pull hard — if the loop closes up, you didn't tie it right.
Once you're confident, tie it on your lure and do the same test. Attach a small weight or lure and pull on the main line while holding the loop. The loop should stay open and the lure should hang freely. If everything moves the way it should, you're ready to fish.
After a few casts, check the knot again. Look for fraying, slipping, or any sign that the wraps are loosening. If the knot looks solid and the loop is still open, you're good. If you see any damage, cut it off and tie a fresh one — a compromised knot isn't worth the risk.
Frequently Asked Questions
Can I use the non-slip loop knot with a swivel?
Yes. Thread the line through the swivel eye, then tie the non-slip loop knot with the swivel sitting in the loop. The swivel will hang in the open loop and rotate freely. This is a common setup for leaders and for lures that spin.
What size should the loop be?
Make the loop about the size of your pinky fingernail — large enough that the lure or swivel moves freely inside it, but not so large that it looks sloppy. The exact size depends on what you're attaching, but start with that guideline and adjust based on how the lure moves in the water.
Will the non-slip loop knot work on light line?
Yes, it works on light line (2 to 6 pound test) as long as you tie it carefully and don't rush the wraps. Light line is more forgiving than heavy line because it's easier to cinch down evenly. Just make sure all four wraps are snug before you start fishing.
How do I know if the knot is strong enough?
Pull on the loop and main line hard with your hands — the knot should not slip or collapse. If it holds under hand pressure, it will hold when you're fighting a fish. If it slips even a little, cut it and retie. A knot that moves under light pressure will fail under heavy load.
Can I tie this knot with one hand?
Not easily. This knot requires both hands — one to hold the loop open and one to cinch the wraps. Once you've tied it a hundred times, you might be able to speed up, but learning it requires full attention and both hands free.