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.

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.

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.)

The parts are for my Sparkfun Third Hand setup. It's come in handy when I've had to hold the circuit boards I solder at an odd angle. The third hands hold it secure enough to solder, but are movable if I want to view the board at a different angle. They are also rather strong considering their small size. This is a cool invention.

I used these to on my PCB workstation on http://www.thingiverse.com/ I put them together and they work. Cut the tube in half put the cut tubes over the alligator teeth. Do it again to add double insulation. Works Great!

I have read some of the other reviews, and the issues with strength, but I have not have not experienced this. It may be that I use these as a supplement to my panavise so I am not overloading them trying to hold a PCB. Basically little things like this allow me to continue enjoy DIY projects despite my arthritis.

These are well made, with threaded ends to match the screws. It might be nice if they were a size larger to hold thicker items when soldering. I do recommend them to anyone building a third hand.

Unlike most third hands these actually work. I bought two of the kits and four of the coolant hoses.Since I have RA in my hands I could not separate the hose links so I did one better. I used a metal reamer to enlarge the base end. I slid the screw from the parts kit into the hose. Attaching the gator clip was easy. I would recommend using a much larger gator clip for heavy projects. Other than that everything is working great.

They work fine but it is so hard (too stiff) to adjust.

The only modification for these parts that I would possibly make would be using larger alligator clips. Also, if anyone is using these for a third hand kit as sold, I would recommend using some thread lock on the machine screws during assembly.

OK, I guess, for tiny objects, but not big or strong enough for something like making an XLR cable. The clips appear to be a knockoff of the Mueller BU-30TBO. Get some Mueller BU-60TBO clips (You Do It Electronics) and #8-32 machine screws. Thread lock on the screws is an excellent idea, too. Otherwise they unscrew when you try to turn them. Sparkfun needs to up their game and switch to the BU-60TBO in the 3rd hand kit.