Spring Assist - Tailwind - Bio-hazard Tanto Stiletto - Spike


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  • Razor-sharp 7Cr13 stainless steel blade
  • Exclusive Tailwind assisted-open mechanism
  • Built-in blade spur for one-hand opening
  • Slim profile makes it discreet
  • Injection-molded nylon handle
  • 4 3/4" closed; 8 3/4" overall

This high-powered stiletto spring assisted knife mixes style with tactical ability. Built for self-defense, this piece is equipped with Tailwind spring assist technology for lightening fast blade deployment. The assisted-open mechanism is activated by pressing the blade spur on the back of the blade.

The blade is forged from 7CR13 stainless steel, comes sharp from the factory, and is finished in black. The handle has a futuristic design with bio-hazard artwork, and provides a secure grip even when wet. The handle also features a belt clip for easy carry. 2 1/2 in. blade, 6 in. overall.

How are Spring Assist different from a Gravity Knife or Switchblade Knife?

Gravity or Switch Blade knives feature a button, level, or other type of switch that releases a spring pressure to automatically open the blade. On a Spring Assist knife, there is no separate button or switch. Instead, you apply pressure to part of the blade to begin the opening process. This is usually a small bump of metal which sticks out under the knife, making it fast and comfortable to use. Once you press on that part of the blade, it automatically opens and locks into place. Since the action of opening the knife is started by pressing the blade metal, instead of a button or switch, it is considered to bypass the laws which ban Switch Blade knives.

19 UC2907

Customer Reviews | Average Rating: 4.30 out of 5
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Customer Reviews

Nov 29, 2015
(5 out of 5)

I got this for a gift and it was amazing. It work great, it never gets jammed and always comes out with a blink of an eye. I do recommend this to anyone who is into knife collecting.


Nov 26, 2015
(5 out of 5)
Awesome Knife

I bought this maybe a month ago and I absolutely love it. It springs out really fast, the fastest I've seen. Mine came fairly sharp but you can sharpen it. Part of the edge hangs out of the side, but as long as you don't sharpen the bottom 3/4 of that side of the blade it's fine. Overall a great knife for $10.


Brandon Gillig
Oct 01, 2015
(5 out of 5)
Nice Knife

I bought this knife a few weeks ago and I was very impressed by the quality of the knife and though the blade isn't as sharp as I would have liked it was still a great buy.


Bri Stu
May 08, 2015
(4 out of 5)
Great little knife

I had one of these before and, unfortunately lost it. I purchased a new one as BudK has great pricing and fast service. Now for the knife. It is sleek and thin. This makes it perfect for EDC. It is well made and comes sharp from the factory, not razor sharp but adequate. The handle is comfortable and ergonomic. It is easy to operate and I like the thin, needle point blade. Both of the ones I have had only came with the protected side of the blade sharp. The exposed side is ground down but not really sharp. I assume this is on purpose to prevent injury of the user. If one wants to sharpen this side it is at a point to place a final sharpening with little effort. Bottom line, this is a great little knife and I definitely recommend it.


Jan 28, 2015
(1 out of 5)
Safety Issue

I should have read that bottom review. The blade is really sticking out the side. Not safe for daily carry. It came dull so I will only sharper the side which is protected, and I will be able to use it. This should really be improved, otherwise its a great knife. Also, there is no safe way to close the knife quickly, you need to grab it by the flat of the blade to close it. Its not a dealbreaker since this is clearly a self defense tool and doesn't not need to be opened frequently but if both these issues were fixed this knife would be much more useful


Mark Davis
Jul 01, 2014
(5 out of 5)
Tailwind knives

A well made and very quick opening group of knives. They are sharp when you get them and with very little effort on my diamond honing stone they are like a razor.


Sep 02, 2013
(5 out of 5)
United Tailwind Spearpoint Stilleto

This is beautiful, well made knife. Needle sharp, and the handle feels like something you could run over with a pickup and be able to just pick back up and stick in your pocket. It's very ergonomic, and the biohazard symbol molding is awesome looking. Came sharp out of the box, even a stilleto is more for stabbing than cutting. The only problem I've had with this, as silly as it sounds, was getting it to open the first time. It was really stubborn for some reason, and I've never seen that with any other folding knife I own. Perfect after I got it broken in though. Great buy


Rick Glenn
Apr 13, 2013
(5 out of 5)
R. Glenn Knife review

I think this knife is great. If you like a knife that you can operate with one hand,(ie. open / close ), then this is definitely a knife you should take a close look at. It also feels quite substantial when you hold it. I enjoyed owning the spear point so much, that I bought a second one. R. Glenn [email protected]


art graham
Apr 03, 2013
(5 out of 5)
Great pocket knife!

Great looking knife. Very fast opening and sharp! Feels good in your hand. Be careful handling the knife as the blade is sharp on both sides. I love it!


Mar 08, 2013
(3 out of 5)
Beautiful stiletto, dangerous carry!

This knife has a beautiful stiletto blade (which is what I was looking for...) and handle design makes for a stable grip so open it is a locked stiletto with a sturdy handle but... And here it comes, why I wouldn't recommend it... When you close the blade, part of the sharp backside of the stiletto protrudes from the skeleton handles. This could cause cuts on your hand while drawing it from your pocket for use or when using the knife closed as a palm stick. If the blade would be completely hidden under the handles, it would be a great knife!!!


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