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Description: This parts kit allows you to modify a coolant hose into an additional hand for your SparkFun Third Hand. It includes the alligator clips and hardware necessary to repair a broken hand, or make a new one.

Note: A portion of this sale is given to Ryan for inspiring the design with his Instructable.


  • 2x Alligator Clips
  • 2x 1" 6-32 Phillips Pan Head Machine Screws
  • 2x 50 x 4mm Heat Shrink Wraps

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Customer Comments

  • Ditto that. I ended up just taking the one that fit properly to my local ACE Hardware and found another one that had the matching thread pattern. I think it cost me about 30 cents. YMMV

  • Has anyone else gotten these and found the two machine screws to be non matching? I got two packs and each had one right size and one smaller diameter screw.

Customer Reviews

3.3 out of 5

Based on 3 ratings:

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2 of 2 found this helpful:

Helping hands kit crocodile clips too small and weak

The clips are a bit on the flimsy side - they bend very easily at the wrist. Slightly bigger and stronger would make them more useful. At the moment they feel like they are going to break if I don’t handle them with kid gloves.

2 of 2 found this helpful:

I wish the alligator clips were bigger

They work perfectly with the coolant tubes in the third hand kit, I only wish that the alligator clips were a bit bigger to accommodate holding PCBs and larger components.

Almost Perfect

Overall I am very pleased with these parts.

There’s two things I think that can be improved.

First, I think the alligator clips could be larger. I haven’t run into issues yet, but I can easily see myself being unable to grip certain things at some future point. For thin items, they work incredibly well.

Second, I think the alligator clips could be a bit stronger. The flat surface between the clip and the screw mount can bend if you’re not careful. I accidentally bent one of the clips when trying to reposition the arm. I have since become more cautious with how I use the clips.

And while this comment isn’t specific to these parts, I think it would be cool if Spark Fun invested some energy in coming up with new parts for future release (lights, fans, magnifying lenses, etc.)