This a case for TI DP83TC813EVM evaluation board.  There is a second top case if you wish to block the power input and instead power via USB.  Assembly requires (4) 3mm hex nuts (example https://www.boltdepot.com/Product-Details.aspx?product=4773) and (4) 3mm x 12mm socket cap screws (example: https://www.boltdepot.com/Product-Details.aspx?product=6381)