Kershaw Injection 3.5 Liner Lock Knife (3.5" Bead Blast) 3830

MSRP: $59.95
Our Sale Price: $13.99!
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Item #BHQ-14794


  • Overall Length:8.00"
  • Blade Length:3.50"
  • Blade Thickness:0.12"
  • Blade Material:8Cr13MoV
  • Blade Style:Drop Point
  • Blade Grind:Flat
  • Finish:Bead Blast
  • Edge Type:Plain
  • Handle Length:4.50"
  • Handle Thickness:0.55"
  • Handle Material:G-10
  • Color:Black
  • Frame/Liner:Stainless Steel
  • Weight:4.40 oz.
  • User:Right Hand, Left Hand
  • Pocket Clip:Tip-Up
  • Knife Type:Manual
  • Opener:Thumb Stud
  • Lock Type:Liner Lock
  • Brand:Kershaw
  • Model:Injection
  • Model Number:3820
  • Designer:Todd Rexford
  • Country of Origin:China
  • Best Use:Everyday Carry
  • Product Type:Knife


The Injection 3.5 folder is a Todd Rexford design with milled G-10 scales and a stout liner lock frame. It features custom details that include a decorative pivot, machined countersunk thumb stud and a chamfered backspacer too. The flat ground drop point blade has a bead blast finish and plain cutting edge. The Injection is loaded with all the things you'd want in an everyday carry knife, including a reversible tip-up carry pocket clip.

The Injection 3.5 is the larger version of the Injection model, and has the same custom features as the regular version, the Injection 3.0 knife.


Customer Reviews

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Awesome Value
Ben W.
This was the first knife that I've ordered from BladeHQ. I saw their YouTube video of their top selling knives for 2017 and when they showcased the Injection I immediately loved its design and general aesthetics...It is a Todd Rexford design after all. A budget friendly version of a custom designer's design + an unbelievable price reduction = mind blown. I've had this knife for about a month now and I think it's an excellent budget EDC choice. It feels and performs even better than it looks. The ergonomics on this knife are off the charts...Definitely a great option for a gentleman's EDC. The knife came hair-popping sharp out of the box. The centering is a little off, but that's to be expected on a budget folder. If I'm being nit picky, the liner lock is a tad shallow and won't be very compatible with gloves (although if you're wearing thicker gloves and using this knife, you're probably in need of a more robust knife anyway). I also noticed that there was a minor chip and scratch on the handle of the one I received, but I'm sure this is an extremely rare occurrence. I'm very impressed with BladeHQ's customer service, and the package arrived a day earlier than
predicted. I have yet to find another online retailer that offers the same level of savings, customer satisfaction, and selection as BladeHQ. If you're even contemplating getting this knife, just pull the trigger (or flip the flipper, lol). You definitely won't regret adding this knife to your EDC rotation, knife collection, or even tool box.
Best bang for the buck
Paul M.
Needed a beater knife for the truck and threw $14 at the Kershaw Injection hoping for the best. Couldn't be happier. Smooth opening, good ergonomics and sweet design. I've returned two sub-par $60 knives that didn't match the quality of this knife.
Amazing budget blade
Kenneth E.
Great knife! I wasn't expecting much as first but when i got it i was blown away. The handles are awesome smoothed g10. Something you never see on a 14 dollar knife. Also, the action was great. Very similar to a rat 1's action. Snappy and quick. The decorated pivot is beatiful and just adds more character to the simple design. 2 suggestions i have is the blade spine be rounded and the finish be stonewashed. However the bead blast makes great cotrast. Overall a great budget knife to throw in a pack or car or even be used as an edc
I enjoy this knife
John D.
No where on earth will you find a pocket knife at this price point the reaches the same quality sits nice in your hand opens smooth sharp blade and easy one handed closing
Great deal for everyday use
Ryan G.
Best for my job for cutting plastic and boxes
Best knife out there (for the money)
Isaac M.
Everything you want in a little beater knife
Edson M.
Great edc for the price love it!
Anthony M.
Shes inexpensive on the heavy side but, she carrys well and cuts like a dream. After a little bit of sharpening and tooling around she has been great to have around the homestead for cutting needs.
One of the best budget blades of 2017
Nicolas S.
It has great ergonomics and amazing blade geometry, really thin and ok blade steel when the price is considered. The action on the few I have handled were great. The clip is alsmost perfect, minimal and carries deep enough, I like the way the lanyard attachment is postioned so it isn't and eye sore for those who don't like paracord sculptures on their blades and it is easy to use. My vote for the best gift knife. I especially like the bigger size in my knives.
Brad L.
This is an outstanding value, once taken apart and with the washers polished, this thing was so dang smooth
High Quality at a low price!
Jonathan M.
This is a new favorite of mine. Kershaw did a fantastic job of bringing this Rexford knife to the budget knife market. The ergonomics are excellent, and I really appreciate the chamfered G-10 scales and backspacer. The bead-blasted finish on the blade looks nice until you start using it, and the liner lock bar pushes my blade off center when closed, but not enough to rub the liner. All in all, an excellent, cheap EDC that I'm not worried about beating up. For $14, I can't think of a knife as good as this one. Certainly far better than many other budget knives for two or three times the price. I'll be picking up another soon!
Will get the job done at an amazing price.
Lake E.
The blade steel isn't a plus or a minus for the price of this knife, and 8cr13mov is very easy to sharpen and use. You aren't going to be carrying this for tactical, hunting, or bushcraft use, so it does not need to be judged compared to those types of knives. This is a great edc folder which is a little heavy, but not too heavy that it's unattractive. This knife is well suited for small edc tasks, and I would recommend this to anyone who wishes to buy a great knife with good design and not feel bad about breaking the bank or possibly losing it.
Excellent Value
Tyler H.
This knife is great. It is outstanding in just about every category. Just a little locktight on the pivot and this blade is perfect.
Great Little EDC
Michael J.
1) Outstanding functional value for the price!
2) Rock solid comfortable handle, no flex whatsoever with the G-10
3) Not a deep-carry pocket clip, but rides acceptably low where Kershaw has positioned it
4) My first experience with 8Cr13MoV steel, edge came “so-so” out of the box. Was super easy with only few swipes on sharpener for scary sharp edge
5)Great blade tip for precision work

1) No jimping on rear blade spine for thumb traction, can be slick with wet hands
2) Thumb studs not the most comfortable.

Quick Thoughts:
25 days since purchase. I picked up both the 3.0” and 3.5” versions. Honestly you can’t beat the Injection models, they give you a lot of usable knife for such little investment.

My only comment to those considering a purchase, is the thumb studs. They are 100% fine for normal use. However, if you want a knife you can open/close 500 times while watching a movie, you’ll get one heck of a sore thumb. The studs have traction grooves milled into them which can become painful.
Not a bad knife for the price I paid
Shawn K.
Got it on sale and I'm happy to report that it's a rather nice knife. Good solid build quality, thick liners, great action running on washers, pretty easy to deploy. If I'm nit picking I'd say the thumb studs could use some more texturing and it's a little heavy. The thumbstuds also get in the way of sharpening the blade. It did not come razor sharp so I touched it up with a 1000 grit stone and got it hair popping sharp, it felt like the steel is a little soft but only time and use will tell. Overall it seems well made and has a nice action so I'm having fun flipping it.