Model # C19

Internet #204170614

Coast DX340 Double Lock Folding Knife


DX340 Double Lock Folding Knife

  • Double-lock safety switch prevents disengagement
  • Thumb studs on both sides for easy opening
  • Lifetime warranty against defects
$892 /each
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Product Overview

The Coast DX340 Double Lock Folding Knife features a patented, double-lock safety switch mechanism that works in conjunction with the primary Liner-Lock. This prevents disengagement when the knife is open, even if the Liner-Lock is inadvertently disengaged. An aluminum handle adds incredible strength and durability, while thumb studs on both sides of the blade make opening the blade easy, either right- or left-handed.

  • 7Cr17 stainless steel blade delivers precise cuts
  • Aluminum handle and frame offer rugged durability
  • Compact design measures 8 in. overall with 3.35 in. blade length
  • Lightweight at just 3.5 oz.
  • Deep carry pocket clip for easy portability
  • Double-lock safety switch works with Liner-Lock to prevent disengagement when knife is open

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Name DX340 Double Lock Folding Knife BX311 Lock Back Folding Knife FX411 Frame Lock Folding Knife DX320 Double Lock Folding Knife
Brand Coast Coast Coast Coast
Ratings (35) (1) (1) (10)
Knife Type Folding Folding Folding Folding
Blade Length (in.) 3.35 in 3.25 in 4 in 3.25 in
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Assembled Depth (in.)
8 in
Assembled Height (in.)
1.5 in
Assembled Width (in.)
.6 in
Blade Length (in.)
3.35 in
Handle Length (in.)


Blade storage
Can Be Sharpened
Hand Tool Type
Knife Type
Lockable Blade
Product Weight (lb.)
Retractable Blade
Tools Product Type
Hand Tool

Warranty / Certifications

Manufacturer Warranty
Backed by Coast's lifetime guarantee against defects in materials and workmanship.

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Customer Questions & Answers

Does blade fold into handle ?

Men use have case pocket knifes handle fold up does this fold the same. Can i buy a case for it? Is it good for hunters?
Asked by: Anonymous
It would be a nice 2nd knife to carry for a hunter.nice double looking feature. You should be able to find a belt case for it, its a common size knife.
Answered by: hash
Date published: 2015-09-20

Is this Made in China or Taiwan?

Asked by: MTimmay
Refer to the original package.
Answered by: msans
Date published: 2016-12-20

how does the blade close? I can find no way to get it closed - was bought with blade open at Hom...

how does the blade close? I can find no way to get it closed - was bought with blade open at Home Depot.
Asked by: Nance
There is a locking mechanism inside the handle portion that lock the blade i at the pivot. Push his part towards the handle of the knife and the blade can fold in.
Answered by: msans
Date published: 2017-03-04
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Customer Reviews

DX340 Double Lock Folding Knife is rated 4.4 out of 5 by 35.
Rated 5 out of 5 by from Good Knife, Great Value This knife has a nice balanced feel, with the center of weight right over the forefinger and liner lock recess. The blade stays safely locked inside the handle thanks to a small dimple and protrusion on the blade and liner lock respectively. It is also easy to open and close with one hand, but it has a very secure locked feeling. There is very little side to side slop with the blade fully rotated and the liner lock engaged. The secondary lock on the top of the handle rotates a plate around into the way of the main liner lock so you cannot accidentally disengage the liner lock and cause the blade to fold up on your hand. The secondary lock also uses a dimple to positively keep it in the locked or unlocked position, however the feature seems to easily loosen as the protrusion ball is mounted on a set screw that is accessible from the outside of the handle. The only reason the quality gets 4 out of 5 is because the blade could have been sharper upon opening the package and the secondary lock dimple/protrusion feature needs to have some thread-locking device or feature applied. All in all, this is an exceptional value for a $10 knife that feels like it should be much more expensive.
Date published: 2013-12-04
Rated 5 out of 5 by from Excellent value, quality knife Very sharp out of the bubble pack. Intuitive opening with the thumb studs, but also flicks open instantly without touching the studs. I might take them off for a more streamlined profile. Aluminum handle has great grip, thumb lock is perfectly situated and easy to use automatically. Looks cool, works great, costs less than one lunch. What's not to love? I plan on ordering several to stash in bags and vehicles. Also, since this knife is so good, I will check out another Coast offering: the FX412, and possibly an economical Coast flashlight or two. Thanks, Erik Wells
Date published: 2016-07-08
Rated 4 out of 5 by from Quality Knife at Great price As a professional firefighter / EMT I am always cutting ropes, belts, seat belts, and cables. This knife has been up to the challenge and has been easy to sharpen. Plus, at this price I don't stress about using it all the time. I keep one on standby just in case. But so far one has done the job and done it well!
Date published: 2014-06-24
Rated 5 out of 5 by from For the price this is a very good knife. I always carry a pocket knife. I lost Avery expensive knife and I saw this one. I thought that I would buy this one to carry until I was able to replace my other knife. After using this one for a few days I decided that it is every bit as good as my other knife.
Date published: 2014-07-08
Rated 4 out of 5 by from Great value knife for price Bought this knife for my son for Christmas. Knife is sturdy and is a good pocket knife for him to use hiking. He really likes the knife. Knife must be sturdy to take what he puts them through, including leaving it out in the weather. No complaints.
Date published: 2014-02-02
Rated 4 out of 5 by from wonderful knife This knife is easy to open, lock and unlock. It's non slip handle is a plus too.
Date published: 2014-07-08
Rated 5 out of 5 by from Great knife, great value It just needed a little honing out of the box. Very smooth action and the extra lock is nice.
Date published: 2014-02-04
Rated 4 out of 5 by from Good knife for the price. I like the size, weight, and feel of this knife. One complaint is since its not spring loaded, the knife opens partially when dropped, it doesn't 'lock' shut when closed. I do likeb the double lock feature when it is opened. The blade dulls easily but can be resharpened quickly. You cant really beat the price.
Date published: 2014-06-10
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