Introduction: How to Make a Balisong (Butterfly Knife)

Picture of How to Make a Balisong (Butterfly Knife)

People, I first want to tell you that due to the fact that these weapons contain very few design flaws, the International police have made it illegal in almost every country; Including Australia, the U.K. and America. So I'm putting this on in case you find that you may require one (to get back at buggers, keep bullies at bay etc.). but nonetheless: Ladies and Gentlemen! Boys and Girls! I present to you the Epitome in weapons; the Butterfly knife!

P.S. First, don't whine to me if somebody gets hurt or killed with my product. you killed 'em so it's your fault.
second, no whining to me to remove them, they're legal in lots of countries and if you're not happy with that; go and join your emo convent. its ok if you just tell me that its illegal in your country ( IF YOUR NICE ILL GIVE YOU SOME TIPS ON HOW TO KEEP IT.).

P.P.S. any suggestions are fully welcome and encouraged. I would love to see the community get creative (even if it is by exploiting one of the most dangerous weapons ever).

Step 1: Making the Handle, Basic Outline

Picture of Making the Handle, Basic Outline

To make the handle is to doe the hardest bit. Since this weapon is custom, measure your hands and cut two half-handles appropriate to said size plus 5 mm or a bit more.

Step 2: Handle, Rounding and Blade Holding Drill

Picture of Handle, Rounding and Blade Holding Drill

next step is to sand the top edge so that they will rotate in the main shaft easily (without colliding). Don't do too much or it can screw the design a bit.

Since that last step was short I'm putting the next one in here as well; in sanding the top you should have created a semicircle (more or less). Halfway through the semicircle drill a 5.5 mm hole.

Step 3: Blade Rotation Rut

Picture of Blade Rotation Rut

Next we will create a 1-2 mm rut a the top of the shaft to allow the blade to rotate. let it be around 2 to 2.5 cm. cut it straight in the middle on the opposite sides to the holes you drilled earlier.

Step 4: The Blade

Picture of The Blade

now to make a blade! at long last! I made my blade tan-to style (a tanto is a ninja knife) but feel free to improvise! make lapu lapu swords, combat knives, goreswords and even small keys! so first part is to make the rotation piece. make sure this fits with your handles so that they can go 180 degrees. then you can make the blade. it must be smaller than the handles of course.

Step 5: Containment Rut

Picture of Containment Rut

this is the unique thing that inspired the "switchblade" style knife. the containment rut is in both handles and is used to hold the handle.

Make the rut halfway through the handle to be safe or more if nessescary, both the handles must conceal the blade completely.

Step 6: Putting It Together

Picture of Putting It Together

finally! use simple 5 mm nuts and bolts to attach the blade to the handles. be sure they are tight!

Step 7: The Greatest Assasin Weapon of All Time!

Picture of The Greatest Assasin Weapon of All Time!

Congratulations! you have just created a Balisong butterfly knife, the most concealable and best assasin weapon known.


ENDERDEATH_ (author)2017-10-18

I made one with all metal, it’s pretty good.

YellowBlu Co. (author)2012-04-23

Awesome! I think I'm gonna try to make a Balisong style pen... Like the one here. I'm in the U.S. so it's illegal to have butterfly knife :(

Tylerchad (author)YellowBlu Co.2016-02-22

Only in some states

carlsands (author)2012-05-09

theres a red spy in the base

bobthebuilder728 (author)2011-10-03

Check out mine

SgtJellyfish (author)2011-08-31

Are these knifes legal in Australia?

Balisong knives are illegal but a bali-sword is not (a knife is considered to have a blade lengh of less than 15" according to customs)

thebboy (author)2008-10-05


splat32 (author)thebboy2008-11-06

um, actually, idk bout anywhere else but in illinois the law is any, ANY (cept switch bladdes), knife that has a blade shorted than 3 inches is completely legal um, i'd make it first then ask him so that if he says no you'd already have it made

pbman123 (author)splat322011-09-13

haha yalls can only be three in. so sad, in texas thats like a wallet/or bullet knife, we get like 5.5 in

pdub77 (author)splat322009-06-24

Yeah, and steal the car and hit the town too. They can't stop you if you ask after you've done it. (insert sarcasm here)

thebboy (author)splat322008-11-06

huh. thanks

splat32 (author)thebboy2008-11-06


thebboy (author)splat322008-11-08


SgtJellyfish (author)2011-08-31

how did you use tin foil to make this knife?

thebboy (author)2008-09-06

hey, anyone that's under fifteen, i want to make this really bad, but i don't know how they would act if i made one. My dad likes things that are classics, even if they are weapons, but i don't know about how he would react to something that has a lot of debates on it's legalness. and i don't want to make it behind their backs cuz then i'd feel guilty and get in a lot of trouble if they found i made a knife and hid it from them. WHAT SHOULD I DO? i don't want anyone giving me crap, but any help would be really nice.

npa4863 (author)thebboy2009-06-29

$10 would buy you a real one...

crazykiddo (author)npa48632011-01-01

found pre sharpened high qualyty ones for 25

Pumpkin$ (author)thebboy2009-12-03

Balisongs have been strictly banned only in the states of Massachusetts and California, though it is popularly believed that they are banned in the entire United States. They were almost made illegal in the state of Oregon, but a 1980s court case argued that using a butterfly knife required skill, and that removed them from the "Gravity Weapons" list in the state of Oregon.

Oregon is my home state, I know you should acquire a Concealed carry permit JUST IN CASE.

Ohio it's ok for open carry (You need a sheath or some method of open carry)


Concealed (With a permit)

  Very shaky topic, if you live in the US, Legislation is trying to limit Americans in terms of Arms. If you're from the UK there's not a "Bloody Chance" You'll use one without hiding it. (Outlawed)

crazykiddo (author)Pumpkin$2011-01-01

in IL i went to my local mall just yesterday and found that a store sell all types of knives saw bailsongs swichblades atou side oping things and something take looks like brass knukules but cover ur whole hand and has blades on it

Pumpkin$ (author)thebboy2010-03-25

From what I just read, you're better off not doing it..I got arrested for using a "Psuedo-song" (Fake Balisong) and that's when I did more research regarding the shape and psychological reaction to it (DAMN YOU ACTION MOVIES) and eventually, the legality and arguments on both sides.

Carrying one is placing yourself in the ULTIMATE $HIT$TORM

lemminggenocide (author)thebboy2009-10-31

hey, I turned 15 a few months ago, and I know you commented over a year ago but I still feel like advising :D makes me feel like I know stuff. Anyway, if you haven't already taken action, my advice would be too start off by asking to make a non sharpened, wooden practice one first (there's an 'ible on it), show it to your parents, learn a few tricks, demonstrate that you can be safe with it. and then ask to make a real one. basically, a lot of positive reinforcement regarding the innocence of your intentions should do the trick. If your not making it to hurt anyone, and know how to be safe with it, then they should let you make one. gud luk

thebboy (author)lemminggenocide2009-10-31

ya, I don't think i have time to make one any more.  I got too much crap to take care of.  My life's gotten busier since last year.

zac_sraw (author)thebboy2009-09-17

soo, just tell him about the history of the balisong knife, you say he like classics...

guydie5 (author)thebboy2009-08-21

i am not giving you crap... this is what i realy think. what is the fun of being a teenage boy withought any mischief. if i were you i would make it ignoring what you parents would do

thebboy (author)guydie52009-08-22

Great point.

dunnos (author)thebboy2008-09-17

make one with a dull blade and say its for tricks =]

thebboy (author)dunnos2008-09-18

should i tell him so that he can help me make it? or should i make it myself and then tell him? Thanks for helping ouy, by the way

dunnos (author)thebboy2008-09-18

depends, i dont know what kind of person you are. if you usually tell your parents about your projects do so now to, you dont do anything wrong, do you? anyway, i always tell what im going to do in front of building it

mountain island (author)dunnos2008-12-20

i always make the thing b4 asking. then either hide it or show them depending on wot they say. if u feel gilty then give it 2 a hobo.

my parents let me build stuff but not dangerous stuff but i make it anyway

thebboy (author)dunnos2008-09-18

alright. thanks. i'll do that.

King Crab (author)thebboy2009-06-17

Ask them

thebboy (author)King Crab2009-06-17

o, ya

casper707m5 (author)thebboy2008-11-13

legally, you can have it in your place of residence and you are allowed to transport it from one location to another, so long as it is in a case or something of the sort.

thebboy (author)casper707m52008-11-14


mountain island (author)thebboy2008-12-20

my parents dont let me hav knives or anything like that but they let me make stuff, so ur parents myt 2... any way the balisong knife is an all time classic weapon so ur dad'll almost definataly let u make or buy 1.

thebboy (author)mountain island2008-12-20

uhuh. thanks for the advice

the gizmoman (author)thebboy2008-10-23

i dont think their illegal to have at home you just cant have them out in public

hunk586 (author)2008-05-21

what did u make it out of??????????/

valkiraun (author)hunk5862008-06-05

sorry i was late in relpying. I have a crap I-net connection. that one above is made out of tin foil. but my real knife is mild steel

netbus (author)valkiraun2010-06-24

lol tin foil?

maddogmal (author)2010-05-02

I found that a old saw blade works grate and its high carbon steel.

ajjardin (author)2010-04-30

Very awesome. these instructions are great. ive been looking for a training (non sharp balisong knife to practice with. this info will help me make my own. thansk alot.

Spring Assisted Knives

valkiraun (author)2010-04-02

I agree with almost all the comments placed about this topic. BUUUUUTT....
Here's how I handle it:
-Don't tell your parents (they'll say no to you anyway)
-do it in secret whilst making another project (stealth tactics ;)
-keep the bali' away from the public eye (an improvised weapon is useless in a fight and unreliable in a cutting situation)
-use it to train in the backyard when parent's aren't looking.
-final step: Ignore all that. lolz, joking, but please, try not to make your bali's public, or they'll get you in trouble and I'll end up getting in trouble and before you know it, a police station will have a raigun-round in it's side (of my doing).
also, if you wanna train to have a real bali' GET a real bali'. the weight training in homemade versions isn't like a real knife.

all things stated above work well for fire twirling aswell. 


MotorstormSj (author)valkiraun2010-04-07

Hey, is this knife Sandwich constructed?

valkiraun (author)MotorstormSj2010-04-15


maggotmatt (author)2008-06-05

i made one... i didn't take anyones idea or anything.. this one is o.k...but you should check mine out. they are illegal and im in the us... but i dont think im gunna get caught.

valkiraun (author)maggotmatt2010-04-02

 Nice job. Mine's more of a "found materials" version of yours though. sot of

I'd recommend making your instructable a little more detailed. sure some things can be left to common sense, but following the directions all I have is four handles and a blade.

jasontimmer (author)2008-11-09

Where the hell did you get this idea about "real" knives? butterly knives are illegal to carry, PERIOD. The cop isn't going to care if you say "oh, I made it myself."

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Bio: Welcome to the weaponmasters guild. Here you will be able to view weapon making tutorials and request some(within reason). Please, enjoy your time here.
More by valkiraun:How to make rubberband gun (NO K'NEX NEEDED)simple, 2 step wooden bokkensHow to make a Balisong (Butterfly Knife)
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