I bought four packs of them and have been soldering them up to everything. So far they're definitely quality.. *very* tight fitting. TBH i don't plug them in all the way so i have a chance of disconnecting them again without tools lol.

I've been using them with 12awg which is on my batteries and most of my charge leads/escs. It's a small gauge to use with them but it works fine. They come with a small strip of braided copper and no mention of it in the instructions. I'm thinking maybe it's meant to be used inside to help out with conductivity on smaller AWG wire?