These are parallel pliers that you print in place. No supports needed, no assembly, they work as soon as you pick them up off the build plate.
You will need to have a printer with decent bridging as there are some long ones in this print.
There are 2 version available the single STL for single extruder printers and then the separate stls for multi color/material printers.
If you are doing a multi material and you have TPU available the parts with cover in the name would be the ones to set as TPU for the grip and clamping part of the jaws.
If not have fun with it and mix and match colors for the rest.
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I would recommend to print this on your faster settings that you find acceptable, also at the lowest temp your filament will work on to help the bridging.
I designed this in Fusion 360. And this was a bit of a challenge. I had never designed a print in place model before let alone one with a function before. I must have printed about 10 of these before the first one worked. I had many that printed and looked perfect until I tried to close them and either a leg broke or they were fused to the jaws.