I have two of these. The first plugs into a regular outlet and is very easy to install. You simply remove the screw from the socket, insert this adapter and screw it in. However, the second one plugs into a GFCI socket and required some modifications. The plug and pin on this adapter will not mate with GFCI outlets. But I found that when you plug this adapter into the top GFCI socket, the screw on the adapter magically aligns with the screw holding the socket in the box, so I did the following: (1) remove the plastic pin of the adapter, (2) remove the GFCI socket, (3) remove the top screw holding the socket in the box, (4) cut a hole/notch in the top edge of the wall plate exactly where the screw is located, (5) insert that adapter into the top GFCI socket, and finally (6) insert the screw so it goes through the adapter, through the wall plate, through the top tab of the outlet, and into the box.
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