The Uni Knot (also called the Duncan Knot or Duncan Loop) and the Palomar Knot are both strong, reliable choices for connecting line to a hook or lure. They approach the same task differently, which is why experienced anglers carry both in their repertoire.
The Two Approaches
Palomar Knot
Uses doubled line through the hook eye, creates a loop that cinches around the hook, and exits as two strands. The doubled construction distributes load across two lines, making it mechanically forgiving.
Core strength: The doubled line and loop construction. A small error in wrapping or seating doesn’t affect the fundamental strength of the doubled structure.
Uni Knot
Uses the tag end of the line to form a loop parallel to the mainline, then wraps the tag end around both strands inside the loop. Tightening draws the wraps snug against the hook eye.
Core strength: The wrapping friction and the loop structure. The number and evenness of wraps directly affects holding power.
Strength Testing Results
| Knot | Monofilament | Fluorocarbon | Braided Line |
|---|---|---|---|
| Palomar | 95–100% | 90–98% | 90–95% |
| Uni Knot | 88–95% | 85–93% | 85–92% |
Percentages represent knot strength as a percentage of line rated strength. Values vary with line brand, diameter, and tying technique.
The Palomar consistently tests slightly higher, primarily because the doubled construction is more resistant to user error. A Palomar tied under poor conditions (low light, cold hands, awkward angle) still achieves reasonable strength; a Uni Knot tied with the wrong number of wraps or poorly seated wraps can drop significantly.
Versatility Comparison
| Application | Palomar | Uni Knot |
|---|---|---|
| Hook attachment (single hook) | ✓ Excellent | ✓ Excellent |
| Hook attachment (large lure) | Limited (loop must pass over lure) | ✓ Works on any size |
| Heavy mono/fluoro (20lb+) | Limited (doubling is awkward) | ✓ Handles well |
| Loop knot for lure action | ✗ Cannot form loop | ✓ Yes (Uni Loop) |
| Line-to-line connection | ✗ Not designed for this | ✓ Double Uni |
| Tying to very small eyes | Limited (doubling at small eye) | ✓ Works |
Winner for versatility: Uni Knot, by a significant margin.
Which Line Type Favors Each Knot
Monofilament
Both knots work well. Palomar for maximum strength; Uni for flexibility and heavy-line applications.
Fluorocarbon
Both work — fluorocarbon’s stiffness can make the doubled loop awkward on the Palomar. The Uni Knot’s single-end construction manages stiffness more predictably. Both require careful tightening on fluorocarbon (lubricate before cinching).
Braided Line
Both work. Braid’s lack of stretch can cause the Uni to slip with too few wraps — use 6–8 wraps. The Palomar handles braid’s slickness well due to the doubled structure. Some anglers use a Double Palomar (two overhand knots instead of one) for extra security with braid.
When to Use Each
Use the Palomar When:
- Single hooks, jig heads, small to medium lures
- Maximum strength is the priority
- Monofilament or fluorocarbon in the 6–20lb range
- The hook eye is large enough to pass doubled line through
Use the Uni Knot When:
- Large lures where passing a loop over the body is impractical
- Heavy monofilament or fluorocarbon above 20lb
- You want a loop presentation (don’t fully tighten — leave the loop open)
- Joining two lines (Double Uni connects mainline to leader)
- You want to know only one versatile knot for multiple situations
Learning Priority
If you’re building a basic knot toolkit:
- Learn the Palomar first for everyday hook-and-lure attachment — highest strength, fast to tie
- Add the Uni Knot second — it fills the cases where the Palomar is awkward, and the Double Uni becomes your primary line-to-line connection
These two knots cover approximately 90% of situations in freshwater fishing.