Massdrop x Ferrum Forge Retracting Utility Knifesearch
In Stock:This product is ready to ship within 1 business day.

Massdrop x Ferrum Forge Retracting Utility Knife

Massdrop x Ferrum Forge Retracting Utility Knife

bookmark_borderSave
(71 reviews)
Where's the price?
To negotiate the best possible price for our members, we must agree to hide our prices externally.



Stickied
Hey everyone - We've posted instRUKtions for changing the blade here: https://s3.amazonaws.com/massdocs/FFWK+RUK+InstRUKtions+(1).pdf
two things - what do I do with the lanyard nub and couldn't you guys have provided a small torx drive that would attach to lanyard? other than that - fun knife
dfortwit6
That's a great idea! Just spit ballin' now. I'm thinking, cut a small segment of a Torx bit, maybe 1/2"-3/4" long (probably 1" max). Attach or epoxy inside a piece of Paracord, sort of like a prophelactic of sorts. The end need not be exposed to avoid scratching the housing, or anything else in pocket. The cord housing could be retracted slightly to expose the Torx, and be useable for blade change out, or just tighten up a loose screw. It could be a separate free hanging piece to attach to keychain. Or could be incorporated with the tied or attached lanyard. Now we're cooking with gas. 👨🏻‍🍳
I for the life of me cannot get the blade screw loose on my RUK. I can't replace the blade because it is simply impossible to remove the center screw. Is there any way to resolve this?
Load 1 more comment
Probably too much locktite used. Mine was hard too, but I was able to get it off by using a driver that allowed for more torque and taking the button out before the body screws. You could also probably try heating up the screw first.
MrLindberger
I've done both already and sadly no dice. It just won't unstick! It's a shame.
What the hell is this thing. They really didn't make it clear that the blade CANNOT be locked in any amount of forward position. I was led to believe the blade would lock forward and the spring would auto retract it when a locking lug was disengaged. the thumb lug to hold the blade forward is INCREDIBLY uncomfortable and borders on dangerous as any slip of the finger or wet hands sends the blade shooting backwards. The mechanism forces you to hold the blade in a very, very specific way that prevents you from using a variety of grips for a variety of tasks. This thing was made to open boxes and packaging. Absolutely nothing else. no cutting inwards, no hobby usage that does not involve running the blade along a straight edge. This is not a carving knife. you have none of the range of motion due to the blade not locking in anyway (not even a friction folder like the absolutely superb spyderco kiwi) The box did not include the mentioned accessories. no extra button piece, no extra screws, no instructions on how to change the blade. This knife is WORTHLESS. Don't waste your money. Get a goddamn gerber EAB, that is a proper tiny pocket knife that uses disposable utility blades, and is a proper locking folder.
Honeybadgers
Ferrum Forge is a shit company, would advise anyone considering a purchase to look up their customer service shenanigans where the owner Elliot shit on a customer for bringing up a problem via instagram.
If you’re left handed this does not function well. The retract nob is only accessible on one side designed for right hand deployment. With a razor sharp knife in my hand I tend to use my dominant hand.
I just received mine. It appears to be half copper and half brass. I ordered copper... Anyone else notice this?
Load 1 more comment
lycanthropejeff
I ordered copper and got all copper. What a spectacularly crap knife though.
Honeybadgers
As much as I hate to admit it, I agree. One of the retaining screws has stripped before I even had a chance to disassemble it or was stripped during assembly. I did cut a small piece of brass stock to use as a jam to keep it closed or open as desired which has been helpful prior to the screw failure.
Hi everyone, The RUKs have passed QC and are ready to ship! You may notice that the disposable blades included with the RUK do not feature a “USA” stamp, however we’ve already confirmed these blades are manufactured by Techni-Edge and indeed made in the USA.
We hope you enjoy your knives. If there are any issues, please contact our support team via the transactions page.
Has anyone tried any blades other than the x-acto z-11 that work? Or even other blade shapes instead of #11 hobby blade? I've seen some posts of other brand suggestions that "should" work, but haven't been tested. I'd like to be able to get some in bulk, but don't want to pull the trigger unless I know they'll work
MrLindberger
Update: decided to go ahead and buy some Excel #11 blades to test. Blade hole size is the same as the Z-11 X-acto blades, so they will fit, but the Excel does not have the flattened bottom that allows for full extensions of the blade. So unless you are willing to take the time to flatten off the bottom edge on the excel blades, they aren't a good substitute for the Z-11s.
So I picked up a couple of doo-dads to compare, and/or use with the RUK. Anyway..... The kit in blue box was a whopping $6 at my local craft store. The oval holes looked a bit oblong, and I thought they may work in the RUK (before I got the Z-11 blades). But they were a no-go anyway. At least they are incredibly sharp, and will still get plenty of use.
search
Then this little guy from Amzn dubbed the "Hummingbird". About half the price for Titanium, but nowhere near as fun to play with. 🤪. Claims it locks open and closed. As well as not needing to hold the slide button during use. But that is simply not the case. True it is not spring loaded for safe auto retraction. The actual action is simply a magnet behind, and riding directly against the blade for friction. So the blade pretty much stays where you push it.....unless pressure is applied to the blade (even with use). So it is required to hold the button during use. And attention to detail is the only guarantee that the blade is fully retracted when not in use....or going into pocket.
search
search


search
Unfortunately none of the included blades work in either unit. The hobby blades don't work in either blade holder. And neither the RUK nor the Ti Hummingbird blades work in each other. And the OLFA blade that came in the Hummingbird was actually fairly dull. Since I didn't have any other blades that would work in it, I spent some time with a loaded strop to bring it back to working razor edge.
Bflying
I've been posting on this item way too much. Sorry about that. But feel I should add one thing concerning the Titanium magnetic action blade above. When it comes to my blades, I'm pretty deliberate in terms of safety and how I handle. Especially with new/unproven (to me anyway) designs. So I've been carrying both the RUK and this "chepper" design side by side to compare. Earlier I put my hand in the pocket to grab them, and my fingertip just barely came in contact with a blade tip. Fortunately I didn't jamb my hand in fast, and was a little gentle in handling while still vetting a new model. So the Hummingbird (titanium frame, magnetic action), even though the description lists as being able to lock open and closed, is not accurate. The magnet simply sits behind the blade, and almost always in contact with. So in reality, no "locking" action at all, just a small amount of friction. The friction must be overcome to move the blade at all. So it's not overly strong. Could easily be bumped or dropped and leave the blade in a dangerous position. I've found the springloaded action of the RUK to be the safest of the pocket hobby blades I have so far.
Anyone know if this would qualify for legal carry in the UK? Assume so as it doesn’t seem to lock and the blade is under 3”.
Eyechild
If you've not already purchased one, I just have. I'll let you know if I get a knock at the door from the fuzz in a few weeks or not!
If titanium...............
Bflying
Amen brother!
It still cracks me up how many people are calling this a box cutter. Seriously? I mean sure, it's not for everybody, so if not for you, great. This is a very small EDC/Hobby blade. You know....as evidenced by all those pictures, description, and ad copy. :D. But comparing to a box cutter? Still pretty funny imagining use as such.
search


Is it me, or is this an attractive, overpriced doodad? For around 30-40 more you can get a very small, pretty knife - the hummingbird.
I don’t get it. It’s a $40 keychain box cutter made in China. Maybe I would bite for $5
So, just changed out the blade with an X-Acto Z-11. Thought I'd mention that it can be done without full disassembly. But does take a little finesse. Here's what I did.... Push blade out half way, and put something thin (pictured is a removable pocket clip) in behind carriage to hold in place. Back out frame screws just about the thickness of the blade....just a little. Remove the button screw. Lift the top of frame just a tad to allow a little blade wiggle room. Carefully grab the tip of blade, tip down to allow the oval clearance over oval post. Remove. Then reverse steps. Insert new blade over oval, and seat. Replace button. Tighten frame screws. Remove carriage stop. Sounds a little belabored. But the first time really took less than a minute. Spent more time looking for my Torx. Second time probably 30 seconds. There it is. For all those that sited the procedure as a no-go for purchase. 😁🤯
search
search
search
search
search
search


Bflying
Which blades are those? My #11 xacto blades don't fit. The oval hole is too small. I've had them for a long time though maybe they changed it since then? Also has anyone experimented with other blade styles yet?
S33z3r
They are specifically the X-Acto model Z-11, from their Z-Series with the elongated center hole. Blade to blade, they are pretty pricey at just over $1 per blade, compared to some of the generic brands at pennies per. But it's not like these are used to rip carpet, and changed out twice a day. 🤪. X-ACTO Z Series #11 Replacement Blades, 5/Pack https://www.amazon.com/dp/B017N0T28U/ref=cm_sw_r_cp_api_mON6Bb7PDR0S8

search

"Instructions for safe blade changing"- advertised as "INCLUDED" with each product. There were no instructions, and no obvious instructions posted here. What's the story, Massdrop? Can you provide this?
wjcunningham
Hi Massdrop, same thing as above. Guess it's Pretty simple to do the blade Change, but it feel's better to do it with propper instructions. Please provide this. Many thanks!
wjcunningham
Hey guys, sorry for the delay on that, I've just posted them above: https://www.massdrop.com/buy/massdrop-x-ferrum-forge-ruk/talk/2266137 Sorry for the delay, we decided that a permanent online post would be better than paper insert.
I recently learned about the big Olfa CKB-2 disposable blades... that would be awesome for a RUK-XL if you ever make one!
search

Has anyone in Canada received theirs yet? I am still waiting on mine
Load 1 more comment
Me too and that was Oct 10
JeffintheNorth
Same here
Anyone can help me with the size of the key/bit needed to change the blade?
Solerf1
Hi Solerf1, its a T6 torx head on all screws.
I wish there was a version of the little blade "sled" that would work with an X-Acto blade. It looks like it would be fairly easy to modify the existing sled, but I don't want to mess mine up just yet.
I tried reshaping an X-Acto and it worked great, but that's obviously not practical every time I want to change the blade..
awk
I think you might have the 'X-Life #11 Classic' X-Acto blade which doesn't work, as you've found. I got the 'Z-Series' X-Acto #11 hobby blade and it works perfectly without modification.
mike.j
Well, I have a suitcase (literally!) full of X-Acto blades that my dad acquired a long time ago (80s/90s vintage)... I would rather use those but they don't fit. So I will probably wait until it drops again and buy a second one and reshape the blade holder, I think it would be worth the trouble. PS Can I get another blade holder from Massdrop ? I'm guessing not.
I'm looking for compatible #11 hobby blades, and have had some difficulty. The first blades I tried were the Techni Edge variety ( http://a.co/d/fYi9luF ) and they do NOT properly work since the top of the blade has burrs and imperfections & scrape along the inside top. Anyone have better luck with different brands?
maxbernstein
Yeah, we had that issue with mass production so each and every blade had to be deburred before shipping. I went out and bought several variations of brands and found the 'Z-Series' X-Acto #11 hobby blade to work great.
mike.j
Thanks!
Have not gotten up the courage to actually break the seal on these yet, because then ‘the rot’ will begin to set in
search
Load 2 more comments
Try the Matthew Walker knot. It’s not too difficult, is very symmetrical and looks nice with one on each side of the bead.
Yeah man, the copper rot looks soooo good. I'm getting blues and purples over the copper color and its looking better and better each day. My brass is just taking a beating and looking battleworn which is still a neat look. As for the knots, try the 2 strand wall knots. You should have enough string to make a set of 3 knots before the bead and 3 more knots aft the bead. As for a resource on learning knots, Paracord Guild has it done right. http://www.paracordguild.com/2-strand-wall-knot-tutorial/
What are the best ways to tie the included cord and lanyard bead? Just a curiosity poll.
awk
Thanks!
EDIT: Well, doy. I’ll just order techni edge blades, the brand you specifically mentioned! 🤓 Leaving the post intact so others can learn reading comprehension by my example.

I’ve received my utility knife and could not be happier with the build quality.
However, I’m having trouble finding an appropriate replacement blade. In the image attached, you can see an xacto #11 blade at the top. However, it dies not fit as the oval cutout is incorrectly shaped.
In the middle is the blade that came with the knife .
At the bottom is a different brand ordered from Amazon. The cutout is compatible, but the bottom of the blade is not flattened, which causes it to scrape along the bottom of the casing and jam before fully extended.
Could anyone recommend a replacement blade that will function without modification? Alternately, it may be possible to grind down the blade carriage to fit the xacto blades, but I’m worried I’d mess it up.
Thanks!
search
Load 1 more comment
Dansor
I have not tried replacing my blades yet (have not popped the seal on mine yet) but I do have a T.U.K.K., so I have been down these roads before. You seem to have two problems, the cutout and the lower 'tanto' tip.
You can use the Excel Blades #11 Blue Blade. These are sharper as they are carbon steel and 'double honed' as they call it (basicly a microbevel I think). But be aware that these comes in a 'regular' silver version and a blued out version (oxide coating for rust prevention, but not on the edge itself). As you see in the picture I can verify that both have the correct cutout and that while the Blue Blade version have the rounded lover tip, the regular version does not. They both have the burrs on the top tho as mentioned about the Techni edge ones (those are also carbon steel but without the blue coating) The Excel blue blades have U.S.A. stamped on them just as in the first pictures of the ruk, with the obvious difference that they are blue
search
Here is where you can buy the blue ones 5pc https://widgetsupply.com/product/ben83.html 100pc https://widgetsupply.com/product/bcp17.html
If you prefer stainless steel, I do believe the X-acto blades Z-series have both the correct cutout and from, what i can see in the photoes online, the rounded lower edge. I do not know if these have the burr on top. These are coated with zirconium nitride on the honed edge, I think for edge retention but may also be for corrosion resistance, so they will have a 'gold' cutting edge that the people that bought the brass version of the ruk might be attracted to. These I believe are made in China tho (subcontracted) 5pc https://widgetsupply.com/product/bel24.html
What complicates things is that Excel have a stainless steel version 5pc https://widgetsupply.com/product/ben06-20021.html 15pc https://widgetsupply.com/product/xja83-23021.html 100pc https://widgetsupply.com/product/bel28-22621.html and X-acto have a blued out carbon steel version 100pc https://widgetsupply.com/product/bbe08.html
(both seems to fit the parameters)
I do stress that I have not actually tried these myself on the ruk,that i have not handled the X-Acto blades at all and that I am not affiliated with Widgetsupply :-)
Dansor
Another frustrating issue I'm noticing a lot of people running into is that X-Acto and other brands have two different mounting holes for the same blade name, '#11' The Z-Series is the right mounting hole whereas the X-Life has too small of a mounting hole and will not work in the RUK. I have the Z-Series in my RUK and they work fine.
Pseudo lefty? I decided to try flipping the blade to see if this thing could be almost lefty friendly. It took a bit of tweaking. And the housing could really use some jimping on the "text side" to help with grip. Although will admit, much of the "grip" is accomplished with the lanyard. Even when using it in righty configuration.
The blade did not re-seat the opposite direction without shaving a bit off the bottom of the edge side. I guess to make it so any blade would fit that way, would require a hair be shaved out of the upper channel of the housing. But for this test, it was easier to simply file a little off the blade itself.
I also pulled out one of my old xacto sets to see what other blades would fit. I found all of the similar blade sizes to have a smaller oblong centering hole, and would not fit the RUK. There were both xacto brand, and off brand blades on hand. None worked. They were all older, so not sure if that had anything to do with it. Maybe there have been some uniform changes made over the years? Won't know until I go shopping for some new blades.

search

search

search
Bflying
I'm not dominantly left-handed, but I was able to use it fine as-is with my left hand, pushing out the blade with my index finger:
search

I found it easier to use a modified grip where I pinch the back of the RUK with my first two fingers and then push out the blade with my middle finger.
search

I like this right-hand modified grip as well. In fact this works fine without a lanyard.
search
Just got mine, but no instructions included, like how to change the blade. Are they online somewhere?
randy_zank
I don't know of any instructions but just take it apart (all three screws), replace the blade, and put it back together?
I also recommend applying some Vibra-tite to the screws so they stay in. (I wouldn't use a curing threadlocker like Loctite because it would have to be broken and re-applied it every time the blade is changed).
awk
Thanks much, I’ll give your suggestions a try!
@JonasHeineman @AveryC @JaleesaG
Will these be going up as a regular stocked item like many of the other xColabs?
I almost lost mine last night when my wife saw what I was fidgeting with at dinner. I showed the pics to her during the pre-order. But it didn't "click" with her until she had one in-hand. Then she just HAD to have one for work. She has both used, and had access to many dozens of folding and utility knives over the years. But I think this is the first time she has actually "wanted" a blade beyond it's basic utility function.
Here's a couple obligatory pics to help break up this wall-o-text. With one of my Wife's three "purse" knives, the Spyder Ladybug Salt.

search

search
Did everyone else also get one of these sweet WE Knife leather travel pouches?

search

search





. . . . .




. . . . .




. . . .



. . . Shhhhhhhhhhhhhhhhhh! I make-a no trouble. 😂
Simply adorable. Makes these little knives look huge. 😁

search

search

search

search
Bflying
Should also add that my family and co-workers are going to hate me. With a new fidget toy that makes clicky sounds. 😁.
My copper version is smooth as butter. I saw a couple posts about a slight difference in action feel between the copper and brass. Happy to add that my example is pretty perfet so far.
I know I've looked at the dimension specs for months, but the actual size in hand is even smaller than I imagined. Not a bad thing, especially if you plan on carrying loose in pocket (or keychain). Just need to get used to holding this mini thing. Did I say this is a fun fidgety toy already? But yup, it is.
Bflying
Yeah, this is going to be my most dangerous fidget toy
Anyone that got the brass set wanna sell me the bead, or wanna trade sets for the copper, let me know!