Hogue EX-04

The Hogue EX-04 is a unique looking knife. Particularly the modified Wharncliffe. While I’ve heard mixed opinions concerning the blade profile(s), I immediately took interest. Do we need another drop-point in the collection? How about another Titanium Frame-Lock Flipper with thrust bearings? While I personally collect, own and enjoy many of the aforementioned, it is exciting to see a designer and manufacturer buck the trend while delivering above average function, fit and finish.

Hogue EX-04

The EX-04 comes in two blade types that are similar to the designer Allen Elishewitz’s Jekyll and Hyde custom knives. The Jekyll style is an upswept profile while the Hyde is the meaner looking, modified Wharncliffe. The models come in 3.5 and 4″ blade lengths. I have a preference for the company’s 4″ varieties throughout the EX series and find that the lines render more elegantly across the larger, wider profile. Regardless of personal taste the 4″ EX’s are large, totaling 9″ in length. 3.5″ models at 8″ are still capable and embody identical build quality while being easier to carry.

Hogue EX-04

The steel used is 154CM. This is a premium stainless produced by Crucible with a high carbon, chromium and molybdenum content. A US version of ATS-34, it is perfect for cutlery applications providing excellent corrosion resistance and good edge retention along with easy maintenance. The EX-04 is hardened between 57-59 Rockwell through a cryogenic heat treating process.

Both versions have a unique double hollow grind. The inspiration comes from sword fullers which lighten and balance a blade while adding rigidity. Due to the technical complexity of manufacturing an even, contoured double hollow grind, the knife had some growing pains pending release. It was definitely worth the wait however as these are (as far as I know) the first production blades brandishing such an ambitious cross section. The final edge bevel has been given an immaculate mirror finish for perfect out of box sharpness.

Hogue EX-04 Modified Upswept

The ‘Up-swept’ EX-04 has a long sloping belly that is useful for a variety of utility tasks. The blade width follows near to the tip where a swedge slightly narrows the .150″ blade stock. The over-all profile provides good lateral strength. Although wide, the spines dropped-point meets the belly at a broad spear-like end. The resulting tip is deceptively good at penetrating cuts rounding out this hard working geometry.

Hogue EX-04 Modified Wharncliffe

The modified wharncliffe has a unique wing-like shape with animated, flowing lines that terminate in a hook-like point. This profile is much more purpose-built and excels at slicing, especially toward the tip. The cutting edge has a pronounced belly with a slight re-curve at both ends of the cutting edge. This model will likely be a polarizing aesthetic, but for me is a welcome diversity and my favorite of the two. Due to the curving edge, it’s good to note that this model is more difficult to sharpen than the Up-swept which has an even convex edge profile.

The concave spine on both allows for comfortable thumb placement giving the user great control. All of the blades in the 04 series come in an even, matte black finish with Hogue USA and Elishewitz’s logo etched on the blade. Satin and stone-wash are not offered in this line-up, possibly due to the complexity of finishing the double hollow grind.

For deployment the knives use stepped, dual ambidextrous thumb-studs. These sit a good distance away from the handle and are benefited by scalloped cut-outs in the scales for quick, reliable deployment. The pivot is exceptionally smooth and has a washer-less construction. The inside “bolster plates” have a raised surface that contacts the tang with a substantial surface area allowing for a laterally stable action.

Hogue Spoon Clip

On opening a button or “plunge” lock holds the blade firmly without play in any direction. Plunge locks are long wearing and mechanically robust. A spring pushes a hardened, tapered cylinder into a slot in the tang preventing closing. When the blade is stowed, the rounded plunger head makes contact with another slot in the tang acting to hold the blade closed. The plunger’s double duty is an elegant solution, negating the need for a ball detent. The mechanism is housed in the nested bolster plates for strength and longevity. In order to prevent accidental disengagement all models have a manual safety.

Hogue EX-04 by Allen Elishewitz

The handle on the 04 provides a very comfortable four finger grip on both the 3.5″ and 4″ models. The shape fully leverages cnc machining capabilities being contoured on all axis. The resulting grip feels natural in hand, much more-so than a slab built knife. This is true in a standard and reverse position. The standard maximizes reach while the curved tail lends itself to thumb placement in a reverse grip. The concave inner edge is shaped perfectly to lock the hand in place without feeling restrictive, supplying confident use. The first finger nests comfortably in the same cutout that helps to access the thumb-studs.

Hogue is offering four color variations including blue-black, red-black, grey-brown-black and solid black layered G10 (G-Mascus) in a “Lava” pattern. For carry, there is a lanyard hole and right handed tip down spoon shaped pocket clip. The handle shape would make tip-up clip placement awkward. As an interesting detail, Hogue has machined the clip stand-off into the scale. This is a nice touch but won’t work aesthetically if you wanted to remove the pocket clip all together. Since the handles are primarily G10, only having steel for the partial nested liners (bolster plates), the weight is kept reasonable despite the large size. 3.5’s weigh in at around 4.48 oz while 4″ models are 5.68 oz.

Hogue Lava G-Mascus

In closing the EX-04 is an original design with above average ergonomics, attention to detail and an excellent mechanical design. The blade variants allow for different applications: the Up-swept ready for utility jobs and the wharncliffe for tasks requiring more aggressive slicing or tip control. Availability in 3.5″ or 4″ blade lengths accommodate size preferences while the multiple scale colors give users even more choice. The double-hollow blade grind is another selling point for fans of stylized blade geometry and is an achievement in manufacture and design. Although delayed in release the EX-04 was certainly worth the wait. Hogue and Elishewitz have successfully pulled together another high quality, locally produced folder at a reasonable price. Throughout the EX line, the company has definitely established themselves as one of the leaders in US manufactured folding knives.

Hogue EX-04 Button LockHogue Lava G-MascusHogue EX-04 CenteringHogue EX-04 Plunge LockHogue EX-04 Clip Detail


3.5″ Model

Overall Length: 8″ (203 mm)
Weight: 4.48oz (127g)

4″ Model

Overall Length: 9″ (229 mm)
Weight: 5.68oz (161g)


Upswept and Modified Wharncliffe styles available

Length: 3.5″ (89 mm) and 4″ (102 mm)
Blade Thickness: 0.15″ (3.8 mm)
Blade Material: 154CM Stainless Steel
Blade Hardness: RC 57-59 (Cryogenic Heat Treated)
Blade finish: Black
Dual Hollow Grind
Dual Thumb Studs
Black powder coat finish


G10, G-Mascus
Partial Nested Liners
Available in Grey-Brown, Red-Black, Blue-Black and Black
Length: 4.625″ (118 mm) and 5.125″ (130 mm)
Right hand, tip down stainless steel spoon shaped pocket clip


Button (plunge) lock
Safety locks open

Made in the USA

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The Edge Observer

The Edge Observer is a site dedicated to knife reviews, primarily focusing on folding knives.

13 thoughts on “Hogue EX-04

  1. You bet I’ll get some comments going on this one! Excellent video, as always. I’m still stoked on the whole EX line. I hadn’t really taken a good look at the whole group until the EX-04, but now that I have, my opinion of the whole line is very high. (And this is coming from a dude that handles a whole heap of knives every day.) The EX-04 really takes the best of all the previous EX models and brings them together in some stellar ergos, great design and beautiful manufacturing. Combine that with the Edge Observer’s video skills and the result is revolutionary.

    1. Thanks for checking out the review Ben! I couldn’t agree more. Hogue and Allen Elishewitz are putting out some awesome knives!

  2. “These are dope. Haven’t watched the video yet, but based on the pictures I love the knife, and especially like the blade shape and the the way they finished the handles.”

    1. Yeah, I love these. Really great to see something outside of the current trends that still delivers!

  3. Is it just me or does the up-swept have more than just a touch of the Böker+ Whale by Ansö about it? Pretty!

    1. Pretty different in my opinion. Also, I think that the custom version of this grind was around long before the Whale came on the scene.

  4. Thank you for a great review!
    The thing I like most with E.O. is the language, it’s not overbearing but precise. As a reader I get a sense that you use your own vocabulary to describe and evaluate the knife. This is a nice break from most other reviewers (Ben from B.H.Q. is of course another exception)where I often get a feeling that they simply repeat the info they got from the manufacturer.

    I’m sold on this knife, it’s such a powerful design and it seems very well-built. This and the Benchmade 940 would take care of all my folding needs.

  5. Great review as usual. I do enjoy and value them. You hit all of the pertinent details – even pointed out the raised/machined pocket clip mount that I had not noticed on mine. I’ve always liked the Hogue/Elishewitz collaborations but had held off purchasing one thinking that they might be a bit too bulky for my tastes. This one is perfect and is my new favorite. Thank you.


    1. The EX-04 is a solid knife! If you are into the great outdoors you should check out their EXF-02. Thanks for checking out the article!

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