This is a set of two black plastic cover plates, for use in covering wiring cavities and other access holes in electric guitars. They also work great for covering access holes in cigar box guitars! So if, after she's all together and the box is sealed, and then you discover your pickup wire has come loose, you can cut a hole and then use one of these to cover it! The dimensions of these black plastic cover plates are 3 3/8" x 5 1/2" and they are just over 1/16" thick. We include 12 black screws for use in mounting these plates (6 each).