SKU: 35416031542

Benchmade 4170BK Auto Fact AXIS Automatic Folding Knife

Sale price$193.50 Regular price$215.00
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Description

Benchmade 4170BK Auto Fact AXIS Automatic Folding KnifeOverview of the Benchmade Auto Fact AXIS 4170BK The Benchmade Auto Fact 4170BK is the classic Italian stiletto completely reimagined as a precision built American automatic folder. Manufactured at Benchmade's facility in Oregon City, Oregon, it pairs a 3. 95 in. CPM S90V spear point blade with the proprietary Auto AXIS mechanism, so you get one handed deployment the instant you need it. What sets the 4170BK apart: CPM S90V super steel with black DLC

Overview of the Benchmade Auto Fact AXIS | 4170BK

The Benchmade Auto Fact 4170BK is the classic Italian stiletto completely reimagined as a precision-built American automatic folder. Manufactured at Benchmade's facility in Oregon City, Oregon, it pairs a 3.95 in. CPM-S90V spear point blade with the proprietary Auto AXIS mechanism, so you get one-handed deployment the instant you need it.

What sets the 4170BK apart:

  • CPM-S90V super steel with black DLC coating holds a razor-sharp edge far longer than conventional stainless and resists corrosion with minimal upkeep
  • Aerospace aluminum handle with woven carbon fiber inlays keeps the total package to just 3.11 oz., making all-day carry genuinely effortless
  • Ambidextrous Auto AXIS button fires the blade open from either side of the handle with one downward pull, closed length of just 4.75 in.

Law enforcement officers, knife collectors, and tactical EDC enthusiasts who demand premium materials, instant deployment, and a slim pocketable profile will find the Benchmade 4170BK in a class by itself.


Key Features

  • Blade Steel: CPM-S90V -- Premium American-made powdered metallurgy stainless steel hardened to 59-61 HRC. Substantially outperforms conventional stainless steels in wear resistance and edge retention, making it ideal for demanding use with minimal resharpening.
  • Blade Coating: Black DLC (Diamond-Like Carbon) -- An ultra-hard, ultra-thin coating bonded directly to the blade surface. Resists scratches and corrosion, eliminates light reflection, and extends the functional life of the cutting edge.
  • Blade Style: Spear Point (Plain Edge) -- A 3.95 in. needle-sharp spear point profile drawn from the classic stiletto tradition. Built for precision piercing and controlled cutting, with enough belly for utility slicing tasks.
  • Auto AXIS Mechanism -- Benchmade's proprietary spring-loaded Auto AXIS fires the blade open 100 percent mechanically when the AXIS bar is pulled downward. The same bar locks the blade securely under load, providing a reliable lock without relying on a liner or frame.
  • Ambidextrous Operation -- The Auto AXIS button is accessible from either side of the handle, making the knife fully functional for both left- and right-handed users with no reconfiguration required.
  • Handle: 6061-T6 Aerospace Aluminum with Carbon Fiber Inlays -- Lightweight, rigid, and corrosion-resistant aluminum bolsters frame woven carbon fiber inlay panels. The result is a handle that is stiff, dimensionally stable, and visually distinctive without adding unnecessary weight.
  • Deep-Carry Reversible Pocket Clip -- A low-profile clip seats the 4170BK deep in any front pocket so only the clip tip is visible above the pocket line. Reversible for tip-up or tip-down carry preferences.
  • Slim Stiletto Closed Profile -- At 4.75 in. closed and 3.11 oz., this knife disappears into a trouser pocket, coat pocket, or uniform pants without printing or snagging.
  • Benchmade LifeSharp Service -- Benchmade provides free sharpening, cleaning, oiling, and mechanical adjustment for the life of the knife. Send it in, and it comes back to factory spec.
  • Made in the USA -- Designed and built at Benchmade's Oregon City, Oregon facility. The "BK" suffix designates the black DLC blade finish.

Specifications

Specification Value
Brand Benchmade
Model / MPN 4170BK
UPC 610953197421
SKU BM-4170BK
Blade Length 3.95 in.
Closed Length 4.75 in.
Overall Length 8.75 in.
Weight 3.11 oz. (88.17 g)
Blade Steel CPM-S90V
Blade Hardness 59-61 HRC
Blade Finish Black DLC (Diamond-Like Carbon)
Blade Style Spear Point, Plain Edge
Handle Material 6061-T6 Aerospace Aluminum with Carbon Fiber Inlays
Locking Mechanism Auto AXIS
Opening System Automatic (Side Button)
Carry System Deep-Carry Reversible Pocket Clip
Country of Origin Made in USA
Warranty Benchmade LifeSharp (free sharpening, cleaning, oiling, and adjustments for life)

Compatibility

The Benchmade 4170BK is a side-opening automatic knife. Automatic knife legality varies significantly by state, county, and municipality. Many states have relaxed or eliminated restrictions on automatic knives in recent years, but some jurisdictions still prohibit ownership, carry in public, or both. Before purchasing, confirm that automatic knives are legal to own and carry in your specific location. WCUniforms ships within the United States only, and the buyer assumes full responsibility for verifying and complying with all applicable local laws.

For maintenance and repair, the 4170BK uses Benchmade's standard torx hardware and is compatible with Benchmade's LifeSharp service program and Benchmade-specific replacement parts. The deep-carry reversible pocket clip fits standard front pockets in uniform trousers, cargo pants, jeans, and jacket pockets. This knife is not compatible with belt sheaths or MOLLE-style attachments without aftermarket accessories.


Intended Users

The Benchmade Auto Fact 4170BK is designed for anyone who demands premium materials, instant one-handed access, and exceptional carry comfort in a single folding knife.

Law enforcement officers who carry a secondary cutting tool for seatbelt emergencies, line cutting, or utility tasks will value the 4170BK's instant deployment, ambidextrous operation, and deep-carry clip that keeps the knife completely hidden until needed. Knife collectors and enthusiasts find the 4170BK compelling for its CPM-S90V super steel, black DLC coating, and the rare combination of a fully automatic AXIS-lock stiletto from a major American manufacturer -- a configuration that simply does not exist at this quality level elsewhere. Tactical EDC professionals, plainclothes officers, private investigators, and security personnel who need a low-profile tool that opens without hesitation in high-stress moments benefit from the slim closed profile and instant mechanical deployment. Military veterans and preppers who prefer proven premium steel and a reliable mechanism over budget alternatives will appreciate the LifeSharp warranty and USA manufacturing. Finally, civilian everyday carry users who want a refined, pocketable knife that does not look tactical on the outside will find the stiletto profile and carbon fiber aesthetics a perfect fit.


What's Included

  • 1 x Benchmade Auto Fact 4170BK automatic folding knife (assembled and factory sharpened)
  • 1 x Deep-carry reversible pocket clip (factory installed)
  • Benchmade product information and warranty card

Note: No sheath, carrying case, or sharpening tool is included. The knife ships assembled and ready to carry.


Available at WCUniforms

WCUniforms is a specialty retailer focused on uniforms, tactical gear, and public safety equipment, serving law enforcement officers, first responders, and the professionals who depend on high-quality tools every day. Unlike big-box or general sporting goods retailers, WCUniforms curates products specifically selected to meet the performance standards of working professionals, and the Benchmade 4170BK Auto Fact fits that standard precisely. Unlike universal-fit folding knives built to a price point, the 4170BK delivers CPM-S90V super steel, DLC coating, and Benchmade's Auto AXIS mechanism in a Made-in-USA package backed by a genuine lifetime service program. Shop the Benchmade 4170BK and our full selection of tactical knives and EDC gear at wcuniforms.com.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 35416031542

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Jennifer Kuhns
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I've only had these pillows for about a week. They are a great quality pillow. The cover is soft and seems well made. My only complaint is that they are VERY full pillows. If you're tall with broader shoulders, you'll probably love them. If you're shorter with a smaller frame you will probably feel like your head is too high and your neck at a weird angle (my problem). There seemed to be mixed reviews about softness....I would consider these a nice medium pillow. Soft filling but firm enough that your head doesn't sink to the bed. Definitely NOT a down-like pillow, so if that's what you're looking for, this is not for you.
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Reviewed in the United States on April 10, 2026
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Maria Fernanda Rojas Mejia
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★★★★★ 5
Soft, fluffy and surprisingly comfortable
Color: White, Size: Queen (Pack of 2), Color: White, Size: Queen (Pack of 2)
I really liked these pillows. I tried to show different things in my photos because I wanted people to see the details: the design, how fluffy they are, and how full and thick they actually look. They are so full that the pillowcase even looks tight once you put it on, which I actually loved because they look luxurious and well-filled. At first glance they look very thick and high, but once you lay down they feel soft and fluffy instead of hard. They adjust comfortably and feel very cozy whether you’re sleeping, relaxing, or even reading before bed. I think they offer a really good balance because they feel supportive without being stiff. Of course, pillow preference is very personal—some people like lower pillows and others like higher ones—but for someone who likes fuller pillows that are still soft and comfortable, these are great. They are spacious, cozy, and feel like a very good purchase overall. I honestly don’t have any complaints so far. Definitely happy with them.
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Reviewed in the United States on May 15, 2026
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RF
Port Orchard, US
★★★★★ 5
Great quality pillows. Very difficult wrapping.
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The Pillows are the real deal. Very fluffy but with good support. I was surprised by the weight of the box they came in, pretty heavy so you know there’s good quality pillows inside. The one negative is that the pillows are packed in very very tight plastic because they come compressed. But the thing is, it’s really a chore to open them. You have to be careful not to cut through the plastic to the material, but the plastic is put on so incredibly tight that it’s even hard to get your finger underneath. But I found a way to open them. Near the top, insert A very flat metal ruler as far in as you could get it. Then cut through the plastic that’s above the metal ruler. That prevents a sharp tool from damaging the pillows. As you get through the plastic above the ruler, keep pushing the ruler further down into the package. Believe me, this simplifies what could be a very difficult unpacking. I am very surprised that the company that makes them does not insert the type of opener that you find on boxes you receive in the mail or even packages that you get from the grocery store where you just pull a tab and that opens the package. These are really good pillows, but you must be very careful about using a sharp object when opening the box and when trying to cut through the plastic. I am a strong man and have the tools needed, a very flat metal ruler, and a box cutter, knife, or razor. Good luck. !!
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