I have previously installed two monitors with this product and plan to install a third. They come with mounting screws and mounting nuts are attached to the sides of the plate, allowing the monitor to be easily installed onto the ledges. It's well done. Black painted steel I think. I had no problems installing it, and the first monitor I installed was a few months ago as of the date of this review. All screw holes matched my mounting frame perfectly, which is not the case with some vendors. All three arrived well packaged. There were no problems with the delivery, but I wasn't in a hurry.
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