Introduction: Caltrop Deployer

Picture of Caltrop Deployer

for the average James Bond

Step 1: Materials

Picture of Materials

for this you will need;

2 pop top cans (the thicker the better, a soda can would work, but the korean iced coffee can I used would be better (don't ask why I have a korean iced coffee can))
1 soup can (a tomato sauce can would be best)

wire hanger
duct tape


can opener
wire cutters

Step 2: Ready the Can

Picture of Ready the Can

if you are using a pop top can follow these instructions (soda can, pop top soup can)

use the can opener to cut the bottom off the first can

use the can opener to cut the top off the second

keep the cut off bottom and the can without the top

else use these instructions (soup can, tomato sauce can)

cut the top off the can

keep both

clean out the can and lids

Step 3: Make the Container

Picture of Make the Container

drill two holes in the top of the can and in the lid (about a centemeter apart)

bend the wire around a pencil

stick it through the holes


now you have a hinge

bend up the overhang on the lid so it lays flat

duct tape the servo to the can

Step 4: Finish It

Picture of Finish It

fill with caltrops

close can and move servo

serve cold and enjoy

do not ever use this if you make this, unless you are Q.
man i would love that job, i even made an exploding pen once.


beauvieux (author)2016-12-20

for sure don't ask to yourself ! NEVER !...HaHaHa

nail face (author)2008-07-17

hey this may sound dumb but...wats a servo and where can i find one?

pparks1 (author)nail face2016-05-30

Hobby shop sells them. They will be happy to help.

andresm (author)2007-07-27

lol, i just made mine for my car, and i didnt want to use my servos so what i did is that i used my KNEX (R) motor cut the cables added some longer cable (so i could go from the back part of my car to the drivers seat) and used tape to put the motor on the deployer so when i activat the motor, a little stick moves and releases the lid.... if u want ( and its ok with AlexTheGreat ) i can put up an instructable on the whey i did this.... (srry if my english is bad, im a mexican so i speak spanish)

pparks1 (author)andresm2016-05-30

That was pretty damn good English. You only got 1 word wrong. ' Whey ' should be "way". Nice going n English is hard.

Pbyrd (author)andresm2008-07-26

I think you should post it

Derin (author)Pbyrd2009-03-26

The Zeroth Law states that he shall post it.

PastTheVoid (author)2009-06-19

Where did you get the tea? Korea?

pparks1 (author)PastTheVoid2016-05-30

He said, "don't ask"

lane29 (author)PastTheVoid2010-12-03

wtf it is tea!!!!!!!!!!!!!!!11 this guy is teaching u how to make a Caltrop Deployer

and u care about tea!

sto843 (author)2015-01-28

did u make an instructable for the exploding pen?

sto843 (author)2015-01-28

did u make an instructable for the exploding pen?

montmorency (author)2008-12-20

um, dude, that's a model airplane control surface servo your using, those things cost a lot, especially with the remote, well over $300.

zack247 (author)montmorency2012-04-12

actually servos cost less than $20.
dunno where you're living :P

kevincai96 (author)montmorency2011-01-02

Let's see... he never said to use a damn remote. A model airplane servo can be controlled with a simple servo controller, probably bought for less than 10 bucks. Not to mention servos themselves often go for less than 20 bucks. So no idea why you would assume he'd go the most expensive option. And who carries around a remote anyway? It'd be smarter to mount a button on the dash, with the button connected to the (cheap) servo controller. The servo doesn't have to be strong, as it has a (relatively) light load. In other words, STOP DISCOURAGING PEOPLE ABOUT THE ECONOMICS OF THIS PROJECT.

Wasagi (author)montmorency2009-04-09

You can butcher them out of broken RC Cars or Helicopters...

Colonel88 (author)Wasagi2009-10-26

And the minimal price for cars is 10$ in Ny....

Evidenceremoved (author)2010-11-11

A Korean iced coffee can? hmmm.....

goltor (author)2009-12-16

Cheap servos can be found at

Derin (author)2009-03-26
Words Corrected:
  • isopropyl
  • diesel
  • liquid
  • deodorant
Words Not Recognized:
  • lysol
Wasagi (author)Derin2009-04-09

Lysol is an Air Freshener brand in the US. Why not just coat the caltrops with lighter fluid, freeze them, and put a sparker attached to the servo? Lug Big Lug, it's really sad that an Instructables member from Turkey has better english than you....

z0mbi3 man (author)2008-09-23

whats servo???

Derin (author)z0mbi3 man2009-03-26

Electronically controlled motors that have brackets AFAIK.
Hopefully this link works.

Crash2108 (author)2006-10-03

The best way for a smoke screen on a car that I've thought of is to just pump glycerin into the exhaust pipe.

Dave Bull (author)Crash21082006-11-21

ethelyne glycol antifreeze makes a thick white smoke used engine oil if you are on budget and its aneat way to recycle

qualia (author)Dave Bull2008-10-16

yuhp recycling "excuse me young man why have you got thick white smoke pouring out your exhaust?" "just doing my part in helping the environment sarge" =]

qualia (author)2008-10-16

haha 3 parts foam 1 part gasoline don't make me laff. if you're using that primitive method use at least 20:1 foam:gas ratio. its nicer when you add ammonium nitrate to the mix.

--Thatguy-- (author)2008-07-22

Is the servo used a standard or continuous

lupinesoul (author)2008-07-18

The best, easiest, and most reliable type of caltrops to make:

fungus amungus (author)2006-08-02

You can skip the motor business and simply use a wire that can unlatch the lid. By using a brake handle and cable for a bike you can easily modify this for a bicycle. Put the deployer on some panniers and you're in business. One of my next projects will be focused on a similar idea.

Yeah, but then you can't add a hidden red button in the gearshift knob to deploy the countermeasures!

duct tape (author)jswilson642008-07-10

You could put a string through it with knots on each side to hold it closed, then put a firecracker or something with an electrical detonator attached to the string. Then when you push the button the string breaks and the hinge opens, releasing your caltrops with a bang!

braingel (author)fungus amungus2006-10-12

i am so doing this

brian250 (author)2008-07-05

under new laws the spikes and cannister comes under terrorism law.i would think twice about advertising them

ker-boom101 (author)2008-07-04

they had something like this in the movie "catch that kid" on the scene when they outrun the police with go karts they had something like this but for effects instead of a servo they used a small explosive

Jackhole (author)2008-06-24

Genius. I might put this on my bike and put those little poppers inside so when they hit the ground they explode. Oh and I'll power it with a DC generator hooked up to the front wheel. I can't wait.

PyroMonger (author)2008-02-08

this would be a sweet idea to incorporate into a bike (or car) if you want to get away from someone or some can even have different items inside the can depending on its purpose. great instructable.

Hawaii00000 (author)2007-12-01

Ummmmmmmm, what does it do??

bennor3 (author)Hawaii000002008-01-16

it drops tacks

Hawaii00000 (author)bennor32008-01-24


jongscx (author)2008-01-21

Flames would kinda defeat the purpose, since that would make them VISIBLE CALTROPS... and thus, easier to dodge...

Electric Rainbow (author)2008-01-13

Oh Korean Iced Coffee? I remember that can! I used to drink those. :P

lordofbullets (author)2008-01-12

if you need truly strong caltrops cut a square of 14 guage steel one and a half inches both ways and just bend two corners up and two down then sharpen with a file also it helps to bend oppisit corners in the same dirtion

lug big lug (author)2007-12-01

if you want to make them flame you have to make napalm and dip it in it and have a automatik igniter system. you make napalm by mixing 3 parts foam and 1 part gasoline. you can use a remotly activated butane lighter.

gmm4life (author)2006-08-04

I like it, but I like the smokescreen idea even better. I'm gonna start getting on a smoke screen Instructable, if that's ok with Doom_Goat and AlexTheGreat. If it's cool with you two I'll make it.

AlexTheGreat (author)gmm4life2006-08-05

you should definitely do it

pyro13 (author)AlexTheGreat2007-05-17

im thinking of making a caltrop shoti

that one guy (author)pyro132007-08-14

this could be considered a dumb idea, but if you stuck a bunch of these into a potato and launched it from one of the bicicle pump powered potato cannons on this site, the potato would splat and send caltrops everywhere

AlbinoBlackSheep (author)2007-06-20

why do you have a korean iced coffee can?

--Thatguy-- (author)2007-06-18

im making a tennis ball mortar(its an instructable by tetranite) and then ill make some ammo that fires balls of calthrops to go everywhere

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