Scientific Anglers Sonar Leader – Kit
Imagine a world where you need to get a fly down to the fish, but all you have is a floating fly line. In that world, the perfect solution would be our SONAR Sinking Leaders. Luckily for you, we live in such a world. These leaders attach to the end of a fly line and can put your fly anywhere in the water column. Sonar leaders feature welded loops on the rear end and a micro-swivel on the front end to reduce line twist. With five different densities you’ll be able to cover the surface to the depths. Ideal for single-handed lines as well as light double-handed lines, no matter the scenario, you can Get Down with SONAR.
Features:
- Designed for use with both double and single-handed fly lines
- Welded loop on the butt end with micro-swivel on the front end (no swivel on floating leaders)
- Five different densities to adjust sink rate from surface to deep water
| Feature | Detail |
|---|---|
| Density Options | 5 different densities |
| Attachment Type | Welded loop on butt end, micro-swivel on front end |
| Line Compatibility | Single-handed and light double-handed lines |
FAQ
What are the different densities of the Sonar leaders used for?
The five densities allow anglers to adjust the sink rate of the leader, enabling the fly to reach specific depths in the water column, from surface to deeper waters.
Does the Sonar leader work with floating fly lines?
Yes, the Sonar leader is designed to attach to a floating fly line and convert it into a sinking leader, allowing the fly to reach deeper water.
Is the micro-swivel included on all Sonar leaders?
Yes, the micro-swivel is included on the front end of all Sonar leaders to reduce line twist during use.


Bella Payne –
The Sonar leaders work perfectly with my single-handed setup. I was able to get flies down to deeper areas where I used to miss fish. The micro-swivel keeps the line from twisting, which makes casting smoother.
Jacob Wilson –
I tried several sinking leaders before finding this one. The five density options let me adjust for different water conditions. It’s reliable and easy to attach to my fly line.
Rachel Burgess –
Great for light double-handed fishing. The welded loop holds securely, and the sinking action is consistent. I’ve used it in both still and moving water with good results.