In this Instructable I will be teaching you how to build a working replica of the Hidden Blade from the Assassin's Creed video game series. Don't be intimidated by the number of steps involved, this is a fun project that should only take you a few days in your workshop and should only cost you around 30 or 40 dollars.

My Design Goals for this Project:

  • I wanted the Hidden Blade to be functional, (to either extend or retract by moving my hand or wrist).
  • I wanted it to look as nice as possible and as real as possible.
  • I wanted it to be easy to build.
  • I didn't want it to require a lot of special parts or tools.

The process of making the Hidden Blade can be broken down into two main parts:

  • Building the blade mechanism (Steps 2-6)
  • Making the Leather Bracer (Steps 7-13)


Hidden Blade Mechanism Materials List:

  • 16” Drawer Slide – This will be what holds the blade and allows it to extend and retract. You can purchase this from home improvement stores like Lowes or Home Depot for about $6. It is important that you get exact same one that I used otherwise the measurements won't work out properly. examine the included picture for product details.
  • Replica Blade – I used a replica WWII dagger for this. the measurements of the blade are 10.5"long, 3/4" in width at the widest point, and 1/8" in thickness. These measurements, especially the 1/8" thickness, are important because there is not a lot of clearance between the moving parts of the hidden blade so be prepared to do some file work to make things fit. To get the blade, dismantle the dagger and discard the handle, pommel, and cross guard components. The blade I used came very dull with smooth rounded edges, if yours is sharp or pointy I highly advise that you sand away the edges so that they are nice and dull, this will make it safer to use and may keep you out of trouble. Cost $12, purchased at local flea market.
  • Small Coil Spring – This spring will be what retracts the blade when it is extended. It needs to have very light pull strength and should be 3 to 4 inches in length and approximately 1/4" in diameter. I purchased mine from Lowes home improvement store as part of a variety pack of springs for around 3 dollars.
  • Flat Spring – This will hold the blade in place when it is extended. you can make this component out of an hacksaw blade, simply cut off a three inch piece of the blade and grind away the teeth.
  • Assorted small nuts, bolts, and washers – The size of the nuts, bolts, and washers doesn't really matter, anything around 1/8” will do fine. You’ll just have to drill your holes based on the size of bolts you are using.
  • Small Nails – These will be cut and turned into rivets to attch the blade lock in step 5.
  • Rubber Washer – when the blade retracts it retracts with a lot of force, this will be used to dampen that force i.e. shock absorber. you can purchase rubber washers in various shapes and sizes at hardware stores, you do not need to have the exact one pictured, just something similar.

Leather Bracer Materials List:

  • 2 square feet of 5 or 6 oz. leather – This can be purchased at leather suppliers such as Tandy Leather, however you can also use leather from an old suitcase or coat to cut down on cost.
  • Leather Dye – For coloring and finishing your leather, if you use repurposed leather from an old suitcase or coat you won’t need this.
  • Button Snaps – These can be purchased from retailers such as Tandy Leather or Michaels Crafts.
  • Rapid Rivets – These are used to attach the blade mechanism to the bracer. They can be purchased from Tandy Leather or Michaels Crafts.
  • Ring – Pick something that fits either your middle or ring finger.
  • String/Cord – Pick something strong but light, kite string or the inner strands of paracord work very well. You’ll need about 1 foot of this.


  • Dremel Tool and Metal Cutting Disks – You will use these for cutting and modifying the draw slide parts. If you don't have access to a Dremel, you can also use a metal hacksaw for the cuts.
  • Files and Sand paper – For removing sharp edges left by Dremel cutting disks.
  • Drill and Drill Bits – You can use a hand held drill or a drill press, both work well.
  • Wire Cutters – For cutting your spring to adjust its strength.
  • Screw Drivers – Installing screws.
  • Metal Center Punch - For marking where you are going to drill holes on the drawer slide and blade.
  • Hammer – for peening down rivets.
  • Xacto Knife/Utility Knife – For cutting your Leather.
  • Paper or Poster Board – For creating patterns for your bracer.
  • Leather Working Tool (Beveler) - This tool is used to create the Assassin's Creed symbol and designs on the leather bracer. The one I used is known as a B60 Craftool Beveler Stamp and is available from Tandy Leather for around 8 dollars.
  • Awl/Drill/Leather Hole Punch – Some way of putting holes in leather.
  • Ruler – Creating patterns.
  • Pencil – Marking patterns on leather.
  • Permanent Marker - For making patterns and cut lines.
  • Safety Glasses - Always wear eye protection when drilling and cutting the metal parts of this project.

Disclaimer: Please use common sense when making and wearing this prop. If you have any concerns about the blade material feel free to replace the steel blade with a wooden or acrylic analog. If you're planning to tackle this project then you most likely already have all the skills necessary to make whatever changes you deem necessary to make this prop suitable for your specific situation and needs. Be safe and be smart!

Step 1: HIdden Blade - Dismantling the Drawer Slide

Start building yoru Hidden Blade by taking apart your drawer slide.  The slide is built with little tabs of metal that are bent up to keep the inside parts of the slide from comming out, so the first thing you have to do is find those tabs of metal and pound them down flat with your hammer.  The tabs are located on the front and back of the outside slide, if you're having a hard time finding them, use the pictures for reference. 
Once the tabs are pounded flat the drawer slide will pull apart.  As you dismantle the slide the bearings that sit between the inside and outside slides will fall out, use a small dish to catch them as they fall, don't worry if you lose a few, you won't need them all.
When everything is taken apart you should have the parts shown in the last picture of this step, the outside slide, the inside slide, the bearing track, the bearings, and the bracket.
Where can I find a good, thin blade? I've been looking, but I'm not sure where to find one that will be easy to separate from the handle. Any ideas? I have all the other requirements. All I need is the blade.
Hello Julie wolf1,<br>I actually have a few extra blades like the one I used for this project. I had planned to make a few more hidden blades but life got to busy. I'd be happy to sell one to you for what I paid for it Plus shipping. It'd be about 20 dollars. Let me know if your interested.
Hey so I'm wondering if you still have any blades left? Please if you do contact me at nsicotte@outlook.com, thx
<p>i used a ruler but the bad thing is that gravity won't bring it down but you can use a ruler opener </p>
Hello Matt2 Silver,<br>Where can I find a good blade for this project? I cant find any blades that are separated from the handle. Any ideas? I have all of the other requirements for this project. The blade is all I need. Please get back to me as soon as you can. Thank you.
Is this the slide
<p>Here's my version of the Vambrace - https://youtu.be/KxnTuLmM3v0 to compliment the blade replica by Ammnra https://youtu.be/Yg6EzIayXqk</p>
<p>This thing is amazingly well described and built. I have one concern though as I read through it, once u have the blade and ready to be one with the creed I would have to swing my arm and let gravity do its work. Is that true or can I just flick my wrist and the blade will shoot out like in the game? For example &quot; You are in a tree and suddenly see you're target I try to air assassinate him but before I do that I either A.) swing my arm across and gravity pulls the blade out, or B.)flick my wrist and let the blade come out &quot; Which way would it work?</p>
It's gravity out and flick to retract. Thanks for your compliments and comment!
Is there a way to make it come out and retract by tugging on the string attached ring?
<p>Here's a video that shows how to make it go in AND out with the ring</p><p>https://www.youtube.com/watch?v=-UsLgzN9L8w</p>
Never mind, i solved a way to make it a ring system
Hey, im having problems getting it to go out. I've even used a longer spring. Tips? It has no problems retracting.
<p>where did you get the blade from?</p>
Or do you pull the ring string for the blade to pop out
When I watched the video I saw that you can only pop the blade out by pushing it out or do you have to fling it out
<p>Would you be able to make this using a dual tiered drawer slide? That way, the blade can still be long, but the housing doesn't have to be as long as the blade.</p>
<p>I made this over the summer 2015, just about finished with the second one:</p>
<p>Would you be interested in making the blade and selling it for a set price?</p>
<p>At what length should the ball bearing track be cut?</p>
How much would you charge to make and ship to someone?
Can you make me one if you do i dont need the bracer already have one
Where can I buy the drawer slide
In a local hardware store
I've been working on my own version of this for quite some time now, and have gone through probably 6 different designs and major changes. I came up with my final design before I saw this unfortunately, but mine works exactly the same way. From what I can see, yours most resembles Ezio's blade from AC2, whereas mine is closer to Edward's from black flag. it doesn't look as neat as yours is due to my use of a hack saw instead of a dremel. You have a very nice blade here. <br><br> http://m.instructables.com/id/Assassins-creed-hidden-blade-10/<br><br>
So can you like somehow help me with that cause that's all I need help with thanks
<p>Lowe's sells them, mine was in with the other drawer slides, bottom shelf, plastic bag, center slide it should say, red label.</p><p><a href="http://www.lowes.com/pd_380986-93052-T35072G16___?productId=50041754&pl=1&Ntt=center+slide" rel="nofollow">http://www.lowes.com/pd_380986-93052-T35072G16___?...</a></p><p>In case you rather order online.</p>
Could you maybe put it on eBay so I can buy it on eBay cause It doesn't let me order it at lowes so if could please try to put 2 of those same drawer slide on eBay so that I can just easily order it over eBay <br>Because I really really want to make this so please
Because I really really want to make this so please!!
Could you maybe put it on eBay so I can buy it on eBay cause It doesn't let me order it at lowes so if could please try to put 2 of those same drawer slide on eBay so that I can just easily order it over eBay
So can you like somehow help me with that cause that's all I need help with thanks
Like I actually can't find the drawer slide in the Richelieu store
Hey Matt2 :). Could you send me a Link to the Blade because i really dont find this. That would be very nice ;) yours beuseful :)
<p>If you could figure it out, do you know what would the measurements be to make it fit an 8 inch forearm with everything in proportion? I'm only 13 so I'm not very experienced with building things like this. </p>
<p>how cheap did you get the replica blade and how do you remove the swastica </p>
You can find them for about $15 on BudK.com. As for removing the swastica, I ground it away with a Dremel sanding drum and then used Dremel polishing wheels and buffing compound to polish the steel back to a nice shine. If you take your time you can make it look like it was never there in the first place.
<p>Glad my message to you came in use. You can search BK1583 on Budk for it. 14.98 a piece, also can search German Dress Eagle Dagger for it also. </p>
<p>ok thanks so much our this useful info and </p><p>I hope you have a blessed day</p>
<p>and how did you get the assassin's symbol on the leather</p>
You've got too options for adding the AC symbol to the leather. The first is to tool it in by hand by wetting the leather and then using tools to form the design. The second method is to stamp it in using a big stamp of the symbol like I do in this tutorial:<br>Design, Print, and Use 3D Printed Leather Stamps<br>http://www.instructables.com/id/How-to-Design-Print-and-Use-3D-Printed-Leather-Sta/<br>
I love the way it looks and I must have one. Is there any way you could make one for me I will pay you of corse. Plz get back to me as soon as you can thank you.
I'm just wondering, do you sell these? If so how much? If not can you send me the pdf for this?
<p>im selling them for fourty bucks if you want one</p>
I REALLY want to buy one of these, can you ship to austria? Pls contact me
Could you possibly ship to the uk ?