Kershaw Injection 3.0 Liner Lock Knife (3" Bead Blast) 3820

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

Item #BHQ-14796
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  • Overall Length: 7.00"
  • Blade Length: 3.00"
  • Blade Thickness: 0.11"
  • Blade Material: 8Cr13MoV
  • Blade Style: Drop Point
  • Blade Grind: Flat
  • Finish: Bead Blast
  • Edge Type: Plain
  • Handle Length: 4.00"
  • Handle Thickness: 0.51"
  • Handle Material: G-10
  • Color: Black
  • Frame/Liner: Steel
  • Weight: 3.30 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

Customer Reviews

awesome budget knife
Manuel l. on Jan 19, 2018

very well made knife you can not go wrong with this one. you get what you pay for. good quality

Excellent Value
Matt D. on Jan 5, 2018

How can you go wrong for $10. I love knives with a full flat grind. The blade centering on mine was pretty good. It is on the heavy side for a 3" knife, but I'm working on skeletonizing the liners right now. The pivot is really hard to adjust and I did round over a couple bits trying to loosen it, but a little heat helped the process. I wish it was a bigger size Torx, but this is a real nitpick on a $10 knife. It's worth it just to chuck in a toolbox.

One of the best budget blades
Nicolas S. on Jan 5, 2018

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.

Great deal!
Carter H. on Jan 5, 2018

I wasn't sure right when I purchased the knife, but I love it. It's a great knife for EDC and is barely noticeable in the pocket. And for the price you can't go wrong.

Excellent Gift!
Dave M. on Jan 5, 2018

I bought three of these knives for Christmas presents for a few buddy's - they were all very happy and really enjoy them. Best value I could find anywhere!

I call it my light saber
James K. on Nov 19, 2017

I call it my light saber because it opens fast and its so sharp it cuts through everything I throw at it. There are a few problems with it one is the thumb stud is kind of a pain to open, the pocket clip is extremely hard to attach to your pocket and there is no jimping at the spine .

Amazing value
Christian M. on Sep 26, 2017

As a knife collector this knife has completely amazed me. It is a great size for carrying, has a good clip, and fits well in pockets. The blade is sharp and great for slicing, the handle is compact yet big enough to be comfortable for my big hands. Both drawing and folding the knife are super smooth and easy with the well placed thumb studs. Locking is consistently solid. This knife is as good or better than almost all my other knives including much more expensive knives. The only flaws I can find are the clip comes down on rough G10 which can be abrasive and the holes in the G10 don't all go all the way through so they can accumulate pocket lint and be hard to clean.

Kershaw Injection 3.0
Bryan T. on Sep 15, 2016

This is one of my favorite knifes to hold. I hold it in my hand and it feels as good and as nice as a $200 knife. Build quality is unreal for 30 bucks. Blade is ultra sharp and its finish looks great. The only short coming if you can call it that is my blade does not glide open with slightest flick. Put thumb on stud and requires you to rotate open. Blade is so sharp and I risk my thumb's skin flicking open. I've tried to loosen pivot a smidge but think it jeopardizes blade play.

One of the best folders out there under $20
Matthew H. on Jan 20, 2018

I've had this knife for about 4 months, and I have so far enjoyed it quite a lot. The 8cr13mov blade will work well for a lot of people so long as they remember to sharpen it, and the G-10 scales feel very smooth but grippy at the same time. It also has phosphor bronze washers instead of teflon, making deployment smoother than other budget folders. But, both the thumb stud and liner lock are incredibly sharp out of the box, so have some sandpaper ready if you don't want to kill your thumb. Also the bead blast is easily corroded, making it look awful after awhile. But if you look past those problems, it's a good knife at an amazing price.

Can't beat this budget knife
Robert W. on Jan 20, 2018

For under $15 (w/ shipping and handling) you can't beat this lil guy. Can't believe there are phosphor bronze bushings on such a cheap knife. Fit and finish are just fine for the price.

Super budget folder
Wesley G. on Jan 19, 2018

The Injection is a great knife for the price. G-10 scales with phosphor bronze washers make this knife a steal. No SpeedSafe is also a plus. The action is great and improves with every flick as the washers break in. I have both the 3.0 and 3.5. Tough to beat as a budget beater.

Awesome knife awesome price
Nathan V. on Jan 19, 2018

Can’t go wrong with this knife for the price u get it for. Lightweight, sharp, blade opens smoothly, easy to sharpen. Best knife I got for the price.

Good Worker
Chase B. on Jan 8, 2018

None of my complaints are really big deals that reduce the functionality of this knife. With that said, I dI have some complaints. This is not a knife to fidget with because of the sharp thumb studs. The bead blast finish promotes corrosion so I sanded mine to a satin finish. Pocket clip is tight, but not the worst I've ever had. The pivot and other screws had red threadlocker and used tiny T6 screws even on the pivot. All things considered $10 gets you one heck of a knife here. World's better than a gas station, flea market, or other cheap knife.

Awesome budget blade
Michael D. on Jan 8, 2018

A well built, good looking knife with decent steel for the price of a gas station zombie killer. What's not to like. Mine has no blade play and cuts really well. The pivot is a little stiff, but it opens just fine so that's really nitpicking. Get one.

Slim & Small
Tae S. on Jan 8, 2018

Good small little EDC that will essentially disappear in your Pocket. Own 4 of these little suckers.. It's very good for the price! Can't beat it. Awesome EDC or beater knife SF

Really great gift knife.
Jared E. on Jan 7, 2018

I bought this as a gift for my dad and I liked it so much that I bought a second one for myself. I prefer unassisted knives and this is a great one from Kershaw. The beadblast is prone to rust spots, but just keep it oiled and you'll be golden.

Good inexpensive knife
Wendell H. on Jan 6, 2018

Saw this knife on the end of 2017 year product review and recommendation. Excellent inexpensive knife. Smooth action and very sharp. Highly recommend it as a primary care or back-up.

Solid Knife
Tyler R. on Jan 5, 2018

This is a really good knife that cant be beat for 10 bucks. The blade is sharp but I did have to touch it up a little. One thing i noticed is that the thumb stud kind of got in the way when sharpening. Other than that though I love it!!

Good Value
Gerald D. on Nov 4, 2017

Came good and sharp from the factory and the lock functions smoothly. The only downside so far is the clip is really tight and takes some force to slide slide over the side of my pocket. Still, for $10, I wish I had gotten a second one.

Great Little EDC
Michael J. on Oct 17, 2017

Pros: ---------------------- 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 Cons: ---------------------- 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.

It's ok
Phillip J. on Jan 5, 2018

The knife is fine. It's a $10 knife.

Ok knife
Ricardo A. on Jan 5, 2018

Came with rust around pivot interior, and shaving sharp edge. After about a month it rusted all over where it says “Kershaw” but that was probably my fault. Overall for 15$ decent knife. Flicks out nicely

Solid value knife but a bit uncomfortable
Michael B. on Dec 4, 2017

I'm no outdoorsman. Just an average guy looking for something to keep in his pocket for minor day to day tasks. I bought this knife as an EDC because I've lost a Kershaw Skyline and Leek and I can't have another heart attack. At $9.99, I thought any shortcomings would be bearable. Pros: Handle is a great length for this small of a knife. Fills the hand. Solid construction. No play in the blade and feels hefty. IT'S CHEAP! If it breaks or you lose it then just buy another one. Cons: The thumbstud has indents that hurt your thumb after a while. No jimping. No place to sit your thumb to really work with it. The bead blasted finish. Looks like the plastic Playskool silverware you buy your kids to play house with. The blade steel isn't made to be a workhorse. Use it hard and rough only if you don't care if it chips. And it's not known to hold an edge for extended times. The G-10 is disappointing. You get G-10 on your knife to lower weight and add grip. This feels like cheap glass filled nylon because it's so smooth. And it's nowhere near as light or grippy as a Skyline. All in all, I might send it back because of the thumbstuds. No real use for a knife if you cringe thinking about opening it no matter how cheap it is.

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