This unit will likely work well with a traditional non-GFI socket. I needed one for my bathroom with a relatively new GFI socket (see photo). This extension cord cannot be grounded with the supplied screw if you have an outlet like mine as there is nowhere for the screw to go. I had to remove the plastic pin that is supposed to fit the bottom plug because my socket is longer and the plastic pin doesn't fit. My husband has assured me that this is normal and does not affect the safety of the extender. The pin simply provides stability. The side holes on the extension cord don't work either. I won't be sending it back but thought I'd add my comments.
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