I bought these a while back, but only installed them recently. I'm using two of them in a solid wood topped-desk. I used a 3 1/4" hole saw bit to put holes into the wood top, although it appears that a 3 3/16" bit would have worked (had I had one -- far more rare than a 3 1/4"). The item appears to be 3 silver disks, with the middle one being a bit over an inch wide, the second (medium) one around that being about three inches wide, and the outside (largest) one being about four inches wide. To open the power receptacle, one pushes the middle (medium sized) disk down, which is spring-loaded, allowing it do depress about one inch. That in turn exposes the center (small) disk, which is a handle used to pull the receptacle up and out of the desk (or the countertop, or whatever it's mounted on). As it pulls up, the USB ports are exposed first, and then the three 3-pronged power outlets. (All of the outlets, including the USB, are powered by a single 3-pronged cord that comes out of the bottom of the receptacle, i.e. hidden under the desk or countertop.)So, why not 5 stars for such a clever solution? One word: Plastic. The silver bits are all plastic, and the black bits are all plastic. Not horribly chintzy plastic, but still plastic. When you're paying thousands of dollars for a countertop, or a desk for that matter, cutting a hole in it to stick in a plastic doohickey just seems wrong. The product just doesn't reek of quality. It's not horrible, but it's not something that inspires confidence either.Note: My product came from the seller "LeopardKing".
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