
They use a cheap soft metal with no spring force. The plate was covered with flux residues. The connectors look like banana plugs, but they're not, and you can't use them with standard banana plugs at all. The parts were soldered crookedly so I don't think quality control is an issue. I bought this because it was cheap and I just wanted to test the ATX power supply, but what I got was just useless broken junk that I wouldn't risk plugging into a good power supply.

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