The hex slot that holds the socket in place is cheap and flimsy metal - like brass? Your allen wrench will break this thing unless you drill a hole wider than you think necessary. It will break, and once it does, you won't be able to get it out except by tearing it to pieces. This is the classic cheap junk where they tried to save pennies by using a weak and flimsy alloy instead of plain steel. I clicked on three of the first six I had installed before tossing the entire package into the trash.
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