Introduction: Credit Card Grappling Hook

The credit card grappling hook is a whimsical little project that combines a credit card, some simple hardware, fishing line thread, and a sewing machine bobbin.  It's functional for light grappling duties, but is mostly just meant to be used as a toy and for entertainment.

Step 1: Materials

The first step is to gather the materials.
  • 2 credit cards
  • fishing line
  • rubber band
  • sewing machine bobbin
  • bolt
  • 2 nuts
  • wing nut
  • 3/16" binding post to fit bobbin

Step 2: Attach Fishing Line to Hook

Using a larks head, attach one end of the fishing line to the grappling hook.  Assemble the grappling hook so it matches the one in the photos below.

Step 3: Wind Bobbin

Wind the fishing line around the sewing bobbin just like you would wind thread on the sewing machine.  This is a fast, clean and easy way to load up your spool with many feet grappling line.

Step 4: Tape Two Cards Together

The structure for the grappling hook is basically just the credit card itself, so in order to keep it stiff and strong, I used double sided tape to stick two cards together.

Step 5: Drill Holes

Drill holes in the card for the hook launcher (rubber band) and the binding post that will hold the cable spool (sewing bobbin).

Step 6: Attatch Spool to Card

Attach the bobbin to the card using the binding post and then loop the rubber band through the top hole to create the elastic launcher.  I made a slight dimple in the back edge of the card that the rubber band fits into which allows me to easily stow the grappling hook when it's not in use.

The last steps are to go shoot at stuff, try to real it in, and to have fun!


sdbersey made it!(author)2011-06-24

so how does the hook retract?

ChrisC1 made it!(author)2014-08-25

ur hand lol

adale123 made it!(author)2013-05-28

how far can it shoot?

01glide made it!(author)2011-11-22

I like it. Imagine over-the-wall cubicle treasure hunts--snag it and you get to keep it ! But, as the safety rep, I would love to find this on someone's desk. I'd have a good presentation at the next quarterly. Remember...It's all fun and games until someone loses an eye.

curious+youth made it!(author)2012-04-20

losing a nut isnt fun either

rockyrakun made it!(author)2011-07-02

Totally wizard!

marley57 made it!(author)2011-06-13

THAT IS AWSOME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! You can hook lots of cool stuff with that thing.

:p tottaly rad man

dariokastro made it!(author)2010-01-21

y de que utilidad es este artefacto.

alcurb made it!(author)2010-01-21

Este artefacto es un aparato para subir paredes come si uno fuera un super-espia, pero solo sirve para arrastrar sillas or terrorizar a su gato :)

yeah+i+know made it!(author)2010-01-21

Dude I love google translate!

g+dude made it!(author)2011-04-09

isnt it beastly???

yeah+i+know made it!(author)2010-01-21

Ha tienes razón! Deben hacer una versión más grande ...

ppsailor made it!(author)2010-01-21

Saludos Dariokastro !
  Este artefacto, lo puedes utilizar como rescatador de barcos a escala, que se han quedado varados en alguna piscina, lago, estanque, ETC,  por alguna falla.
 En  nuestro grupo de Modelismo Naval, lo llamamos "*911" (asterisco 911) o "rescatador", es muy útil, desdeluego es de un diseño diferente, ya que utilizamos un carrete mas grande, sedal o cordón, y una pelotita de esponja en un extremo.- Asi es que yo lo encuentro ideal para este propósito, ya que es de reducido tamaño y puedes llevarlo en cualquier bolsillo.
  Puedes visitar el sitio en la web, de Modelismo Naval de Reciclado, es muy intresante:
Estaremos en contacto
Atte. PPsailor 

lolo11113 made it!(author)2011-02-28

what is wrong with the spanish speaking?

ElvenChild made it!(author)2010-12-24

Buenos dias (Senor) como Esta?

Capt.+Kidd made it!(author)2010-06-29

i hate how you have a drill press and i dont

nk97 made it!(author)2010-04-30

Really nice idea. Keep up the AWESOME work!!!!!!!!!!!!

rosesand56 made it!(author)2010-01-21

Sew, what is the purpose of this?

brickman93 made it!(author)2010-04-25

absoluty nothing!(no jk its just for fun) 

Veve+Tech made it!(author)2010-02-19

I'm gonna build one and harrass the teacher

Seleziona made it!(author)2010-04-03


mrbones121 made it!(author)2010-04-03

ya go grappling hook

thelastonekills made it!(author)2010-02-15

this thing is cool

inventordude14 made it!(author)2010-02-06

 cool! im going to build a few of these for my friends

awesomemom made it!(author)2010-01-31

so what is this supposed ta do?

Biohazard1194 made it!(author)2010-01-18

Wait... Everytime I shoot it (I got one made last night in my sleeplessness) it just hits the card.... How do I fix it. I tried shooting from every angle possible and it always just hits the card or barely misses.

noahw made it!(author)2010-01-19

Mine seems to work fine.  I just aim like normal with the rubber band hand and then pivot the back of the card down a bit to keep it out of the way.  Interesting...I haven't had a collision yet.

Biohazard1194 made it!(author)2010-01-20

I found my problem... my screw/bolt was alot bigger and heavier then the one you used. I went out to the garage and found some smaller/lighter screws/bolts and fixed it. Now it does great  :D

an_artist made it!(author)2010-01-19

:,D wel all i can say is lol-rotc (laughing out loud - rolling on the chair) ..."admin-made credit card ibles"...

hi111 made it!(author)2010-01-18

 i am swinging on my bunk bed yay 
jk Still fun

%3DSMART%3D made it!(author)2010-01-18

hahaha thats really cool,
You could sharpen the wings of that nut to make them grip more and superglue a match to the bobbin to use as a handle to wind it in.

very nice 5/5

Kryptonite made it!(author)2010-01-18

You there! Stop larking about with credit cards and get some real work done!

Wait did you say grappling hook? 5/5!

Biohazard1194 made it!(author)2010-01-17

The second I find an old card or two I'm making one :D

fwjs28 made it!(author)2010-01-17

heh-heh- heh- heh...heh- heh...BUWAHAHAH
oh the fun you could have with this little guy :D 

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Bio: I've worked for Instructables off and on since 2006 building and documenting just about everything I enjoy doing. I am now the Creative Programs ... More »
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