SOG One-Zero XR Black Aluminium Handle Folding Knife
SOG One-Zero XR Black Aluminium Handle Folding Knife
When SOG set out to build a flagship everyday carry folder, they didn't cut corners — and the result is the SOG One-Zero XR Black Aluminium Handle Folding Knife. At the heart of this knife is a 79mm (3.1") drop point blade ground in a saber configuration and crafted from CRYO CPM S35VN stainless steel, a premium powdered metallurgy steel cryogenically treated to SOG's own specifications to achieve a blade hardness of 60–62 HRC. That treatment process refines the grain structure of the steel at a molecular level, translating to exceptional edge retention and toughness in real-world use. Paired with a precision-machined 6061-T6 aircraft-grade aluminium handle and SOG's proprietary XR Lock, this is a folder built to perform day in and day out — whether you're in the field, at camp, or heading out on a work site.
SOG One-Zero XR Black Aluminium Handle Folding Knife Key Features
- Blade Steel — CRYO CPM S35VN: CPM S35VN is a premium powdered metallurgy stainless steel widely regarded as one of the best all-round knife steels available. SOG's cryogenic treatment process pushes hardness to 60–62 HRC, delivering outstanding edge retention and resistance to chipping without sacrificing toughness.
- Blade Geometry — Saber Grind Drop Point: The saber grind creates a strong, thick spine that transitions to a thinner edge bevel, balancing cutting performance with durability. The drop point profile keeps the tip strong and controllable — a practical shape for general-purpose field and camp tasks.
- Blade Finish — Two-Tone Black TiNi with Black Chrome Accents: Titanium Nitride (TiNi) coating provides a hard, corrosion-resistant black finish across the blade. Black Chrome accents on the hardware add contrast and a premium aesthetic without adding weight.
- XR Lock Mechanism: SOG's XR Lock is rated to withstand up to 1,500 pounds (680 kg) of force, making it one of the strongest locking mechanisms available in a production folding knife. A unique release action causes the blade to slightly kick outward when the lock is disengaged, allowing the blade to be closed with a simple flick of the wrist rather than pinching the blade spine.
- Handle Material — 6061-T6 Aluminium: 6061-T6 is a heat-treated aircraft-grade aluminium alloy offering an excellent strength-to-weight ratio. The sculpted handle design incorporates hidden fasteners for a clean profile, with no protruding hardware to catch on gear or clothing.
- Ceramic Ball Bearings: The pivot system uses ceramic ball bearings, delivering a smooth, consistent deployment with minimal friction and excellent resistance to corrosion compared to standard steel bearings.
- Opening Mechanism — Thumb Hole with XR Assist: The thumb hole cut into the blade allows for ambidextrous manual opening, while the XR mechanism's blade kick-out function speeds up deployment without the need for an external spring-assisted system.
- Pocket Clip — Reversible Low-Carry: The low-carry reversible clip supports both left and right-hand tip-up carry configurations. Low-carry positioning keeps the knife deep in the pocket, reducing print and keeping the knife secure during active use.
- Dimensions and Weight: Blade length 79mm (3.1"), overall length 198mm (7.8"), closed length 119mm (4.7"), blade thickness 2.5mm (0.10"), weight 111g (3.9 oz). A well-balanced carry weight for a knife of this build quality and specification.
The SOG One-Zero XR is a no-compromise everyday carry folder that brings together top-tier steel, a proven locking platform, and precision manufacturing into a package that's refined enough for daily carry and robust enough for hard use in the field. It's the kind of knife you buy once and rely on for years.
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