The Benchmade 4170BK Auto Fact takes the lines of a classic Italian stiletto and rebuilds them around Benchmade's AXIS Auto mechanism. Press the slide and the 3.95" CPM-S90V blade snaps open and locks with the same solid, play-free feel the AXIS system is known for. It is a dress automatic that still carries like a working knife.
Why the 4170BK Auto Fact stands out
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CPM-S90V blade steel at 59-61 HRC, one of the highest wear-resistance stainless steels Benchmade offers, so the edge holds through long cutting sessions.
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Black DLC coating over a slim 0.11" spear point for corrosion resistance and a low-glare finish.
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AXIS Auto deployment, ambidextrous and fully automatic, with the AXIS bar locking the blade from both sides.
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6061-T6 aluminum handle with carbon fiber inlays, keeping the knife at just 3.11 oz despite an 8.74" open length.
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Made in the USA and backed by Benchmade's LifeSharp service.
Specifications
- Model: Benchmade 4170BK Auto Fact
- Blade steel: CPM-S90V, 59-61 HRC
- Blade length: 3.95"
- Blade thickness: 0.11"
- Blade style: Spear point, plain edge, black DLC finish
- Handle: 6061-T6 aluminum with carbon fiber inlays
- Mechanism: AXIS Auto, side-opening automatic
- Length open: 8.74"
- Length closed: 4.80"
- Weight: 3.11 oz
- Origin: Made in the USA
Frequently asked questions
What is an automatic knife?
An automatic knife, often called a switchblade, opens under spring power when you press a button or slide rather than pushing the blade open by hand. The Benchmade 4170BK Auto Fact uses Benchmade's AXIS Auto mechanism, so one press of the slide fires the blade open and the AXIS bar locks it in place.
Are automatic knives legal to own?
Automatic knife laws vary by state and even by city, and some places restrict ownership, carry, or both. Check your current state and local laws before ordering the Benchmade 4170BK Auto Fact, as we cannot advise on the rules where you live.
What is the difference between an automatic and an OTF knife?
Both are automatics. An OTF fires its blade straight out the front of the handle, while the Benchmade 4170BK Auto Fact is a side-opening automatic, meaning the blade swings out from the side of the handle on a pivot just like a conventional folder.
What does LifeSharp cover?
LifeSharp is Benchmade's free factory service. Send in your Benchmade 4170BK Auto Fact and Benchmade will clean, oil, adjust, and resharpen it back to a factory edge for the life of the knife.
Where is the Benchmade 4170BK made?
The Benchmade 4170BK Auto Fact is made in the USA at Benchmade's factory in Oregon City, Oregon.
Is Going Gear an authorized Benchmade dealer?
Yes. Going Gear is an authorized Benchmade dealer, so your Benchmade 4170BK Auto Fact arrives new with the full factory warranty and LifeSharp coverage.
