Latest news... December 23rd, just on the eve of Christmas!
This is the first tool in history to be sent to space via email and completed printing in orbit!
To be honest, I haven't even had the chance to print it myself, but the popularity of it is absolutely off the charts.

I found it here:
http://nasa3d.arc.nasa.gov/detail/wrench-mis

However, neither IE8 nor Firefox can ever download the file normally.
However, I was able to download the files successfully on my Android device, but it just wouldn't transfer them to my PC properly. In the end, I had to first compress the files into a ZIP format on my Android device, then transfer the ZIP package back to my PC, and only then was I able to get it done.

Speaking of which, the engineers at NASA, whose imagination is so vast that it could encompass the entire planet, actually forgot to modify the file permissions?

In short, let every friend on Earth have a chance to admire this "space wonder" now!

Update: I printed with PLA material on the K8200 printer, with the layer height set to 0.2mm.
In the original design, the middle part was supposed to be able to rotate and have a ratchet function, but my finished product is just stuck together :o(
It seems that for printers that only operate on Earth, it is necessary to increase the gap appropriately.
As for the specific effect, you can experience it by yourselves...