Temu 80A electrical terminal (Patreon)
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The trickiest bit about this video is knowing the exact composition of the brass-like alloy used for this connection block.
It's a fairly standard component used in industrial panels for distribution of power to sub circuits. If you get one from a prominent electrical supplier it's reasonable enough to think the brass will be brass, but when it comes from an unknown manufacturer you really don't know the electrical characteristics of the materials used.
That said, I've had undesirable components supplied by prominent UK electrical supply companies. Notably a similar power block from CEF that had a very brittle plastic housing that cracked at the slightest provocation, and was totally unsuitable for its intended purpose.