UPDATE: Please see my new version here. It's a quicker print too! https://www.thingiverse.com/thing:2757071
NO SUPPORT NEEDED. I designed this specifically so support would not be needed.
I designed this to hold two pieces of wire for soldering together. The adjustable jaws make it perfect for larger or smaller gauge wires.
Required: rubber band
You can scale this down if you wanted to as well. I gave plenty of room between the clamps that heat shouldn't bother them at all.
Print the arms flat on their side and then slide them on to the base when finished. The pivots might need a bit of light sanding to reduce friction so they clamp on their own using the rubber band.
Slide the rubber band through the bottom hole on each arm and wrap around the pegs.