Benchmade 4170BK Fact AUTO Folding Knife 3.95" S90V Black DLC Spear Point Blade, Aluminum Handles with Carbon Fiber Inlays
* Pricing Info

$500.00

rated 4.8 stars out of 5 Read 9 reviewsWrite a Review
Part #: BM4170BK | Benchmade Knives
Out of Stock, but typically ships from KnifeCenter within 5-7 business days.
Ships for Free!
U.S. Shipping Only
Calculate Shipping
Save to Wishlist
Double Points Item!
Earn 10,000 knifeREWARDS Points!
Enough for a $50 KC Gift Card!
KnifeCenter.com: Authorized Benchmade Dealer

Description

BM4170BK: 4170BK Auto Fact

Benchmade

The 417 Fact re-imagined the classic Italian Stiletto knife as a contemporary EDC and Tactical tool. Now it's been taken one step further with the 4170BK Auto Fact. Featuring aerospace aluminum handle scales with a sleek carbon fiber inlay, the addition of the Auto AXIS mechanism connects this modern-day folder to its traditional switchblade roots. A black DLC coated blade, made of premium S90V super steel, ensures phenomenal edge retention for prolonged life and low maintenance, making the Auto Fact a perfect choice for enthusiasts and super-spy alike.

Specifications

  • Blade Length: 3.95" (10.03 cm)
  • Blade Thickness: 0.110" (2.794 mm)
  • Handle Thickness: 0.51" (12.95 mm)
  • Blade Material: CPM-S90V Stainless Steel
  • Blade Hardness: 59-61HRC
  • Blade Style: Spear Point
  • Blade Finish: Black DLC
  • Weight: 3.11 oz. (88.17 g)
  • Handle Material: 6061 T-6 Aluminum with Carbon Fiber Inlays
  • Locking Mechanism: Auto-XIS
  • Pocket Clip: Deep-Carry Tip-Up, Right/Left
  • Overall Length: 8.74" (22.20 cm)
  • Handle Length: 4.80" (12.19 cm)
  • Class: Black
  • Made in the USA

UPC Code: 610953197421

Related Categories

Benchmade Knives, S90V Blade Steel, Aluminum Handle Material, Folding Knives, Folding Knives Automatic Knives, Made in USA

Badges

Product Clip Type Badge: Pocket Clip
Product Handle Badge: Aluminum Handles
Product Steel Type Badge: S90V Stainless Steel
Product Country of Origin Badge: Made in USA

Customer Reviews

Benchmade 4170BK Fact AUTO Folding Knife 3.95" S90V Black DLC Spear Point Blade, Aluminum Handles with Carbon Fiber Inlaysrated 4.778 stars out of 5 (9 reviews)
4.8 out of 5 stars
5 star
7
4 star
2
3 star
0
2 star
0
1 star
0
Benchmade 4170BK Fact AUTO Folding Knife 3.95" S90V Black DLC Spear Point Blade, Aluminum Handles with Carbon Fiber Inlays
rated 5 stars out of 5
Danf
 Chicago, Illinois
Jul 25, 2026
Pros: Blade Material, Blade Sharpness, Ease of Opening, Handle Feel, Handle Material, Lock Ease of Use, Lock Type, Overall Quality, Pocket Clip
Cons: None
Virtually a Gold Class Knife
I will try to keep this short because the other reviews are well written. However, what you cannot appreciate until you hold this knife is how well everything is executed. All of the edges - even those on the pocket clip - are smooth and rolled. The fit and finish is a step above. I have several Benchmade knives, including a Barrage (assisted opening), a 940-1 (carbon fiber), and a 943. I also own several Pohl Force knives. The Auto Fact is in an entirely different league. It justifies its price. I highly recommend it.
Benchmade 4170BK Fact AUTO Folding Knife 3.95" S90V Black DLC Spear Point Blade, Aluminum Handles with Carbon Fiber Inlays
rated 4 stars out of 5
Eric
 Georgia, USA
Dec 07, 2025
Pros: Blade Material, Blade Sharpness, Handle Feel, Handle Material, Lock Type, Overall Quality, Pocket Clip
Cons: Ease of Opening
Lambo Knife
Too darn nice to beat around as an EDC so I only pull this thing out of the garage for dress and when I want to show off. Absolutely beautiful design and material details with a solid build and lock. Black blade is a perfect color offset. Fits nicely in the hand but I would rather the deploy be a push-up instead of a pull-down. For me, I have to hold it a little bit weird to open it because of this. The deep-carry clip is great because of the length of the knife. No doubt what the design intent is for this knife, and it lives up to it as the nicest stiletto you could own. Another winner from Benchmade.
Benchmade 4170BK Fact AUTO Folding Knife 3.95" S90V Black DLC Spear Point Blade, Aluminum Handles with Carbon Fiber Inlays
rated 5 stars out of 5
Jerzeyboy!
 Albany, NY
Oct 24, 2025
Pros: Blade Material, Blade Sharpness, Ease of Opening, Handle Feel, Handle Material, Lock Ease of Use, Lock Type, Overall Quality, Pocket Clip, Sheath, Weight
Cons: None
It's Aɓout Time!
I bought the original 'Fact' back in the day, and was flustered and disappointed by my inability to deploy it as it should have been deployed! Ì bought this beauty, and now a second one, because my daughter called methe day the first one was delivered and praised how beautiful it was and how well it now deployed! (hint, hint, hint!) I wasn't sure I would ever get to see the one that had just arrived! Suffice to say, she was right; beautiful and beautiful deployment! To be frank, this beauty has become a collectable, only! It is way too big to be carried legally in New York State, and Iwould hate to have it confiscated, and have to add the fine to the cost of the knife! But it has found a good home!
Read all 9 Reviews »