SOG Stout FLK Folding Knife
SOG Stout FLK Folding Knife
- Blade Length: 2.62 inches
- Overall Length: 6.39 inches
- Closed Length: 3.77 inches
- Product Weight: 4.09 oz
- Blade Thickness: 0.15 inches
- Blade Steel Type: CRYO D2
- Blade Shape: Clip Point
- Hardness: Rc. 58-60
- Handle Material: G10 and Stainless Steel
- Locking Mechanism: Frame Lock
- Opening Mechanism: Kick, Thumb Hole
- Country Of Origin: China
- Handle Color: Blackout
- Edge Type: Straight
- Blade Finish: Black Titanium Nitride
A compact folder built on serious steel, the SOG Stout FLK Folding Knife is the result of a collaboration between Danish designer Mikkel Willumsen and SOG founder Spencer Frazer, and it shows in every detail. The clip point blade is made from CRYO D2 tool steel, a high-carbon, high-chromium steel that has been cryogenically heat-treated to push grain refinement and carbide distribution beyond what conventional heat treatment achieves, resulting in a blade that holds an edge hard and handles real-world use without complaint. At a closed length of 3.77 inches (9.58cm) and weighing just 4.09 oz (116g), it disappears into a pocket or onto a belt without fuss, yet opens with confidence via a thumb hole or kick for one-handed deployment. Whether it's living in your pack on a hunt, riding your hip during a day of pest control work, or pulling duty as a reliable camp knife, the Stout FLK punches well above what its compact dimensions might suggest.
SOG Stout FLK Folding Knife Key Features
- Blade Steel: CRYO D2 tool steel, cryogenically heat-treated to a hardness of Rc. 58-60. D2 is a high-carbon, high-chromium semi-stainless steel known for exceptional wear resistance and edge retention, with the cryo treatment further refining the steel's grain structure for improved toughness and longevity.
- Blade Geometry: Clip point profile with a straight edge and a thickness of 0.15 inches (3.81mm). The clip point offers a fine, controllable tip suited to detail work, skinning, and general cutting tasks.
- Blade Finish: Black Titanium Nitride (TiN) coating. TiN is an extremely hard ceramic coating that adds surface hardness, reduces friction, and provides corrosion resistance while giving the blade a low-visibility blackout appearance.
- Blade Length: 2.62 inches (6.65cm), with an overall open length of 6.39 inches (16.23cm). Compact enough for daily carry, still capable for field tasks.
- Handle Material: G10 and stainless steel construction in a Blackout finish. G10 is a high-pressure fibreglass laminate that is extremely tough, virtually impervious to moisture, and provides a secure grip even in wet or cold conditions.
- Locking Mechanism: Frame lock design. The frame lock uses a portion of the handle itself as the locking bar, bearing directly against the blade tang for a solid, reliable lock-up with minimal play.
- Opening Mechanism: Ambidextrous thumb hole and kick for smooth, consistent one-handed opening without the need for a separate stud or disc.
- Carry System: Reversible belt clip allowing tip-up or tip-down carry and left or right-hand configuration to suit your preference or work environment.
- Weight and Dimensions: 4.09 oz (116g) with a closed length of 3.77 inches (9.58cm), keeping the knife genuinely pocketable without sacrificing a usable blade length.
- Country of Origin: China, designed in collaboration with Mikkel Willumsen and SOG founder Spencer Frazer.
The SOG Stout FLK is the kind of no-nonsense compact folder that earns its place in the field by simply working every time you need it. With CRYO D2 steel, a solid frame lock, and a carry-friendly form factor, it's a well-considered tool for hunters, property workers, and outdoors people who want a capable blade that won't slow them down.
What steel is the SOG Stout FLK blade made from, and why does it matter?
The blade is made from CRYO D2 steel, which has been cryogenically heat-treated to a hardness of Rc. 58–60. This process improves edge retention and durability compared to standard heat treatment, making it a solid choice for everyday cutting tasks where you want a blade that holds its edge well over time.
How does the SOG Stout FLK open, and how does it stay locked open safely?
The knife can be opened using either a thumb hole or a kick, giving you flexibility depending on how you prefer to deploy it. Once open, a frame lock mechanism holds the blade securely in place during use. The closed length is 3.77 inches, making it compact enough for comfortable pocket carry.
What is the handle made from on the SOG Stout FLK?
The handle combines G10 and stainless steel in a Blackout finish. G10 is a fibreglass-based laminate known for being lightweight, tough, and grippy even in wet conditions, while the stainless steel adds structural rigidity. Together they provide a durable, secure grip for an EDC folding knife.
Does the SOG Stout FLK come with a belt clip, and can it be repositioned?
Yes, the Stout FLK includes a reversible belt clip, so you can configure it to suit either left- or right-hand carry preferences. At 4.09 oz and 3.77 inches closed, it's designed to sit comfortably on a belt or in a pocket as a compact everyday carry option.
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