It looks like you’re referring to the Boomerang Tool Company’s Fly Fishing Tippet Line Cutter, designed for trimming monofilament (mono) and fluorocarbon (fluoro) fishing lines. Here’s a breakdown of its key features and benefits:

Features:
1. Compact & Lightweight – Easily attaches to gear (vests, packs, lanyards) or fits in a pocket.
2. Sharp Blades – Precision-ground stainless steel for clean cuts without fraying mono/fluoro.
3. Boomerang Design – Curved shape allows easy one-handed operation; line slides into the cutting notch.
4. Durable – Corrosion-resistant materials for saltwater and freshwater use.
5. Versatile – Works on tippet, leaders, and other light fishing lines (not for heavy braid or wire).

Why Anglers Love It:
– Faster than fumbling with scissors or teeth.
– No risk of accidentally cutting your fly line.
– Minimalist design avoids snagging.

Common Use Cases:

LONG SNIP - Boomerang Tool Company Fly Fishing Tippet Line Cutter Mono Fluoro

– Quick tippet adjustments while nymphing or dry-fly fishing.
– Trimming tag ends after tying knots (e.g., clinch, improved clinch).

Pro Tip: Some models include a hook sharpener or a built-in split shot crimper—check the specific version you’re considering.

Would you like help finding retailers or alternatives?