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!