I stand corrected. In my experience the way they screwed together mashed the exposed wire tightly against the metal cone and didn't slip out at all when I tugged on them pretty hard. Also,you could leave one end connected (and thus protected from your goofy ass accidentally blowing a fuse) while you strip/prep the other wire you're putting to it. I had no issues with them. However, I won't argue against a good solder as the best connection. I just happen to really suck at them and these presented a decent option.