Introduction: Knex Claw

Picture of Knex Claw

This is a personal sized claw perfect for picking up objects, annoying siblings or pets, or just messing around with. It's got four "fingers" that close in with the pull of a "trigger". Enjoy!

Any comments or constructive criticism are appreciated. And please rate it if you like it. Thanks!

Step 1: The Claw

Picture of The Claw

This is the claw! It grabs stuff. Didn't think you'd get to the good stuff first did you?

Pics 1-3: The claw from different angles
Pics 4-5: A single claw
Pic 6: The claw base
Pics 7-8: Attaching the claws to the base
Pics 9-11: Attaching the rubber bands

Step 2: The Arm - Part 1

Picture of The Arm - Part 1

This is most of the arm, and how to attach it to the claw. There is a small mistake with the pictures, but I will point it out for you.

Just follow the pictures and my comments on the pictures.

Step 3: The Arm - Part 2

Picture of The Arm - Part 2

Ok. This finishes up the arm. The mistake pointed out earlier gets fixed in this step.

Once again, follow the pictures and my comments.

Step 4: The Handle

Picture of The Handle

You're almost there, last part!

Step 5: Operation

Picture of Operation

It's pretty simple to operate. Your palm goes on the end, and your fingers go above and below the middle of the yellow connector. Just pull, and grab stuff. Pure, unadulterated fun.


Lolman4000 (author)2015-04-10

Awesome! *4

CedricW (author)2014-09-28

I implemented this into a knex gauntlet, love it.

randoman221 (author)2014-04-12

Very good can u pls comment on mine id like some advice to make better 'ibles.



metalsonic (author)2013-03-07


oblina (author)2013-02-10

Very good model, I like it. It is a very good idea, but the claws are very limited. Perhaps More designs for claw attachments?

bjarne96 (author)2012-01-16

please make it longer, but 5*

CobraKaisensei1122 (author)2011-10-09

Great claw! 5*s!

Atomic_Sparkz (author)2011-10-06

Thanks man, it works and it's beast. Appreciate it ;D

Snosageman99 (author)2011-10-01

Can someone tell me what the message in the yellow box step2 the arm pic ! because its not showing up

sniper_lover (author)2011-09-17

fack! my finger's death! it's very difficult

jack999 (author)2009-04-30

darth vader your model is wicked!!!!

DB2016 (author)jack9992011-07-30

DarthVader was my friend, who back in the day, had the camera and I didn't, so he posted it and all the I'bles/Comments/etc. that you saw by him. I reposted it for him and anyone who wants to see, though, this is a good claw too. In fact, it has inspired me to make a small version too. I never thought of smickel's mechanism, he deserves a lot of credit. Click my name to see the old grabber if you still care, and smickel, forgive my advertising, I am not trying to intrude, just offer another idea!

dhyu (author)jack9992011-07-09

it is!!!!!!!!!!!!i wish he could post it again!!!!!!!!!!!!!!!!!!!!!

dhyu (author)2011-07-09


dhyu (author)2011-07-09

I love it smickel.Best claw I EVER MADE!!!!!!!!

skyfaller (author)2011-03-25

its been an hour, and im only half way done.

skyfaller (author)2011-03-25

step 3 killed my fingers D:

kolkmanusa (author)2011-01-02

so does this arm use simple machines? if so, what are they? maybe a pulley, or sometihng?

skyfaller (author)kolkmanusa2011-03-24

Well, you ''pulley'' on the yellow connector XD

~Aeronous~ (author)2010-07-27

Why have I not seen this before? This is one of the best concepts I have seen. Is it possible to extend it?

yes but it makes it weaker so you would have to use tan rods or black rods

aleceatsfood (author)2010-12-08

This is very nice yah maybe a little bigger claw but anyway this is very good

fredboekel (author)2010-11-27

I made him he is cool good job
keep up the good work

Roob1 (author)2010-08-20

Would it be possible to make the actual claw bigger

squiddy412 (author)2010-06-30

Thank you for the large and multiple pictures. I don't know how I would be able to come up with anything like this. If I tried, my brain would would fry. I really like it!

dmclaa (author)2010-06-28

Does it attach to your arm. If it doesnt can you build a bit that attaches to your arm.

lphillips094 (author)2010-03-03

i love the claw!
im using it in industrial tech class to build a robot arm
ill try 2 post a picture of it when it is done

smickel (author)lphillips0942010-03-03

Thanks, I would love to see a picture of that!

lphillips094 (author)smickel2010-05-25

here it is
i hope you like it
i might try to post a video of it working on you tube but i need to figure out how to get it from my phone to my computer
by the way- im the one with blond hair
what do you think of my friends mu-stash

smickel (author)lphillips0942010-05-26

Wow, that's amazing! It looks like it works with hydraulics, no? The syringes in your hands must control different parts of the arm. That's so neat! I hope your can get your phone communicating with your computer because I'd love to see a video of it in action.

By the way, your friend's mustache is quite elegant.

lphillips094 (author)smickel2010-06-04

yah my phone is dumb i realy wish i could put up the video i tell him to shave almost every day but he loves the stash!!! haha

u can txt the video to youtube

yah i could but the video is 2 long to send

lphillips094 (author)smickel2010-06-04

oh and yess it does work with hydrolics

hotjazz (author)2010-05-29

Hey, love your claw work.  Using it for my robotic arm challenge.  But, it doesn't work!  Could you tell me what I have done wrong BY WEDNESDAY?

hotjazz (author)hotjazz2010-05-29

smickel (author)hotjazz2010-05-29

It seems as though there needs to be another two blue spacers between each orange connector and the middle white snowflake connector. There should be a total of one silver spacer and two blue spacers, whereas there is only one silver spacer at present. I hope that fixes the problem, however should that not be the case, post more pictures and I shall take another look.

hotjazz (author)smickel2010-05-29


Here ya go...still couldn't get it to work.  I couldn't fit both of the blue rings on.  I don't want to argue, OK?  Me just trying to get project done.  Yours was the best idea!

smickel (author)hotjazz2010-05-30

First of all, the correct spacing is very important for the claw to work, so you're going to need to squeeze that last blue spacer in. Just pull the white snowflake connectors a little more apart, and it should fit in nicely. Secondly, I noticed that you did not use a wheel in between the claws. If you don't have one, you're going to need to fill the gap in it's place. I would recommend putting in a white snowflake connector with four green rods attached to it, as that would provide the most strength next to a wheel. You need to make sure, however, that the tan clips on either side of the claw are facing the same yellow connector on the claw. If you get confused, just take another look at that part of the instructable.

With those changes, it should work. Good luck!

hotjazz (author)smickel2010-05-30

All right, one last question.  What do you mean that the tan clips on each side should face the same yellow connector?  Do you mean that they have to face the same way?

smickel (author)hotjazz2010-05-30

I mean they should clip onto the grey rod in the same position, and they should point toward one of the yellow connectors in the claw. The pictures in the instructable should help.

hotjazz (author)smickel2010-05-31

Thank you for all your help!

smickel (author)hotjazz2010-05-31

No problem. Did you get it to work?

deij (author)2010-04-10

do you need the wheel??

smickel (author)deij2010-04-11

No, you don't need the wheel, but its inclusion strengthens the mechanism.

bhuty (author)2010-04-07

where abouts is the trigger on the handle?

smickel (author)bhuty2010-04-11

The trigger is the yellow connector near the back end.

AUG-5OM3 (author)2010-04-03

good instructable and pictures and easy to build
very good XD

redgator12 (author)2010-01-17

This instructable is amazing! And, if there is a grip for another hand, are the rubberbands necessary for the claw to work?

smickel (author)redgator122010-01-19

Thank you. In answer to your question: yes, the rubber bands are necessary as they hold the claws open, forcing them into contact with the mechanism that pushes them together when the trigger is pulled. Without the rubber bands, the claws would hang loosely on their pivots.

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