How to Make a Balisong (Butterfly Knife)

About: 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.

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).

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: 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

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

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

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

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

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!

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

Be the First to Share


    • Art Skills Challenge

      Art Skills Challenge
    • Make it Move

      Make it Move
    • Teacher Contest

      Teacher Contest

    94 Discussions


    1 year ago

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


    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 :(

    1 reply

    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)


    Reply 10 years ago on Introduction

    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


    Reply 8 years ago on Introduction

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


    Reply 10 years ago on Introduction

    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)


    11 years ago on Introduction

    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.

    4 replies

    Reply 9 years ago on Introduction

    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)


    Reply 8 years ago on Introduction

    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