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Drop + Ferrum Forge Mordax Button Lock Folder

Drop + Ferrum Forge Mordax Button Lock Folder

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Product Description
The original Mordax was one of Ferrum Forge’s most popular designs. Usually the custom knife shop only makes limited batches of each knife—but thanks to our strong partnership and the Massdrop community’s demonstrated interest in their work, we’re bringing the Mordax back, this time with a few key changes to make it even better Read More

Premium Materials, 100% Made in the USA

The original Mordax was one of Ferrum Forge’s most popular designs. Usually the custom knife shop only makes limited batches of each knife—but thanks to our strong partnership and the Massdrop community’s demonstrated interest in their work, we’re bringing the Mordax back, this time with a few key changes to make it even better. The original Mordax was made from titanium; here, we chose super lightweight aluminum scales to make it even more pocket friendly. For the blade, we stuck with what worked: premium CPM-20CV stainless steel with exceptional edge retention and corrosion resistance. Perhaps the biggest change? The button lock. Now, the flipper can be opened and closed with a press on the button and a simple flick of the wrist. And because we know knife nuts come in all types, we’ve got the Mordax in 10 different styles.

 Note: Due to the sensitive nature of shipping knives internationally, we are able to ship only some of the knives on Massdrop to select countries. It is the responsibility of the buyer to know and comply with all importation regulations and local laws. Click here for additional information.

Drop + Ferrum Forge Mordax Button Lock Folder

Heavyweight Stature, Lightweight Construction

Measuring 8.25 inches long, the Mordax is our largest project yet with the San Diego–based Williamson brothers of Ferrum Forge. Despite its size, the knife weighs less than 4 ounces thanks to the aluminum scales. That lean construction makes it easy to control in tight spaces—not to mention there’s a finger choil for choking up if the job requires it. The 3.6-inch drop-point blade is as versatile as they come, whether you need to slice through cardboard, cut twine, or prepare food. Fitted with a deep-carry stainless steel pocket clip, the knife keeps a low profile.

Drop + Ferrum Forge Mordax Button Lock Folder
Drop + Ferrum Forge Mordax Button Lock Folder

About CPM-20CV Stainless Steel

CPM-20CV can withstand wear under the most demanding circumstances. Developed by Crucible Industries (one of the leading manufacturers of specialty steels for the cutlery industry), it’s made through a process known as Crucible Powdered Metallurgy, which results in near perfect consistency in the distribution of carbides. Compared to conventional melting practices, the CPM process produces a steel characterized by superior dimensional stability, grindability, and toughness. Nearly identical in chemical makeup to M390 and CTS-204P stainless steel, CPM-20CV is known for its impressive ability to hold an edge and high resistance to corrosion.

Drop + Ferrum Forge Mordax Button Lock Folder

Pro-Tech: Military-Proven Award-Winning Knives

Based in Artesia, California, Pro-Tech Knives is a family-run operation that’s been in business since 1999. Boasting a wide range of tactical, collector, and military-proven knives, the company stands behind a '100 percent made in the USA' policy. Using state-of-the-art equipment—including 3-axis CNC machines and EDM wire-cutting machines—Pro-Tech is able to achieve a fit and finish that rivals handmade custom knives. Need proof? They've taken home Blade Show’s award for “Best Investor/Collector Knife” the last six years running.

Drop + Ferrum Forge Mordax Button Lock Folder
Drop + Ferrum Forge Mordax Button Lock Folder

Ferrum Forge: 2 Heads Are Better Than 1

The dynamic duo of Elliot and Chris Williamson, better known as Ferrum Forge, has proved an outstanding partner since our first collaboration in mid 2017. Together we’ve successfully launched seven projects and put more than 10,000 knives in the hands of the Massdrop community. Founded in 2009, Ferrum Forge started from humble beginnings in Elliot Williamson’s Southern California garage. Using pieces of steel like old files and leaf springs, Elliot gradually taught himself the art of knifemaking. As his skills grew, so too did demand for his work. Luckily, Elliot’s brother Chris joined the team in 2012 to help expand Ferrum Forge to what it is today: a small operation dedicated to designing and producing custom knives through a rigorous process of development, machining, iteration, and quality control.

Drop + Ferrum Forge Mordax Button Lock Folder
Drop + Ferrum Forge Mordax Button Lock Folder
Drop + Ferrum Forge Mordax Button Lock Folder

Community Reviews

“This is a really, really nice piece. Ergonomically, it’s kind of on point. The action on it is just spectacular, and even the blade grind is pretty nice. It’s not the thinnest thing ever behind the edge, but you know what, for this kind of a utility cutter, it’s good to go.” - Nick Shabazz, YouTuber

“I think it’s very much worth the price. Overall, I really do like the knife. This just makes an awesome EDC.” - cutlerylover, YouTuber

“It’s been a pleasure to carry. My favorite thing about this is the action—this is what Pro-Tech is known for.” - Slicey Dicey, YouTuber

Style Options


  • Designed by Ferrum Forge Knife Works
  • Produced by Drop
  • Manufactured by Pro-Tech Knives
  • Country of origin: USA
  • Blade: CPM-20CV stainless steel
  • Blade type: Drop-point
  • Grind: Flat saber
  • Finish/coating: Stonewashed or DLC
  • Handle: 6061-T6 aluminum
  • Handle finish: Anodized
  • Opening mechanism: Flipper tab or button release
  • Lock mechanism: Button lock
  • Pivot: Caged bearings, hardened steel washers
  • Steel pocket clip for right-handed, tip-up carry
  • Hardware: Torx (including pivot, replacing the 1.5 mm hex pictured)
  • Blade length: 3.6 in (9.1 cm)
  • Cutting edge: 3.4 in (8.6 cm)
  • Blade thickness (at spine): 0.12 in (3.2 mm)
  • Blade thickness (1 mm behind apex): 0.03 in (0.7 mm)
  • Handle length: 4.6 in (11.7 cm)
  • Handle width without clip: 0.5 in (1.22 cm)
  • Handle width with clip: 0.65 in (1.65 cm)
  • Overall length: 8.25 in (21 cm)
  • Overall weight (without milling): 3.85 oz (109 g)
  • Overall weight (with milling): 3.6 oz (102 g)


  • Warranty: Pro-Tech limited lifetime warranty via Drop


We get it. Sometimes what you ordered just doesn’t work out. If that’s the case for you, don’t fret! All customers (both US and international) may return this item in new, unused condition within 30 days of delivery.


Estimated ship date is Jan 27, 2021 PT.

Payment will be collected at checkout. Cancellations are accepted up to 2 hours after checkout for in-stock items, or up until pre-order ships.

Top Customer Questions20
What's the best way to sharpen and maintain this?
Nov 13, 2019
Top Answer
Diamond stones and a strop, you can sharpen it without diamonds but it will take a ton more time.Read More
Nov 30, 2019
See 4 More
Does anyone know what the button lock is made of?
Feb 19, 2020
Top Answer
Stainless steel. It’s a hallmark of ProTech and is VERY well done.Read More
Mar 3, 2020
See 1 More
When will this batch be shipped I ordered mine in february any info is appreciated.
May 20, 2020
Top Answer
Don’t know. I too ordered mine in feb and can’t get a response as to any current statusRead More
May 28, 2020
See 3 More
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User Photos67
Customer Reviews0
All of our reviews are from verified customers.
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Recent Activity
Received the Mordax today and i do like how lightweight it is for the size. Right away i did notice is has the mushy button lock flipper detent unlike the malibu which does indeed have a much crisper break upon deployment although the Mordax does seem to deploy reliably. I have not disassembled either knife but looking at the button locks they appear to possibly use the same exact button locks so I’m guessing the difference in the detents is milled into the blade tang geometry where it interfaces with the button. Regarding the mordax’s milled handle i had also read about the sharp/hot spots but decided to take the chance since I’m not that fond of the Malibu’s slick aluminum handle nor my other Protech handle, an SNG. I have nothing against aluminum handles as long as they have some type of texture to break up the slick feeling. I have a Cold Steel code 4 which also has this issue and ended up sending it for some hand engraving which worked wonders so I suppose that’s always an option for the malibu. The milling on the mordax handle is good for me until you get to the bottom of the handle which gets thinner where your fingers wraparound and the designer chose cheese grater like 90° blocky milling which is always just a bad choice for a knife handle. If they would’ve not done that part and just left the milled lines throughout it would’ve been much better. I would like to see that on the Malibu actually adding some milling lines for texture sans cheese grater area. I suppose as long as ones not planning on hard using the mordax and just mainly light to medium EDC use it shouldn't present a problem though and it does look nicer than Plain flat AL slabs. I’ve only had the mordax for a few hours and the Malibu for a couple months or so now but i think I do prefer the Malibu and had already decided it will most likely stay in the collection as it does have a lot going for it where as the mordax I’m not so sure yet but they are both quality blades. Ive handled and own many makes/models over the years and there is no such thing as the perfect folder. There are Always compromises and it comes down to how the design and features align with our preferences and what we are willing to overlook and what is a showstopper ultimately.
I own both and love them both, I was more teasing the person above bc I think they really dialed in their button lock system by having an actual detent feel like on a standard frame lock or liner lock knife. On the mordax the opening isn’t as crisp on the breakaway but it kind of compensates for it by having a much larger heavier blade to still get it open well due to it inherently having a higher inertial value because it has more mass/weight. i guess it just comes down to preference. Ok, one last point I’ll leave u with, since in all likelihood I’m being way too verbose and self indulgent in my response lol. While the milled mordax looked more attractive and I was initially being called by its siren song, once I did some research before pulling the trigger, I came to realize almost every reviewer I watched or read was in agreement that unfortunately the milled variant is not comfortable bc of the milling being too sharp. And now that I’ve had the chance to handle the milled version first hand I’ve got to agree with them. I know u asked this ages ago and I’m probably too late for my response to be of any use to you but I’m depressed and awake so I thought “hey, why not just write an essay about a pocket knife to roll into the void of one of the billion internet comment sections” lol anyway, so how do u like the Mordax? Do you prefer the Malibu or the Mordax and what did u think abt the milling? edit: oh noice, I thought this was a message from months or more ago, glad to know I wasn’t late lol if anything maybe a little too fast of a response, it’s like jeeZ dude get a life…amIRightorwhat?😅
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