ITEM NAME:3.5" to 2.5" SSD/Hard Drive Drive Bay Adapter Mounting Bracket Converter Tray LU 3.5" to 2.5" SSD/Hard Drive Drive Bay Adapter Mounting Bracket Converter Tray.There are 4 screws holes on the underside of this unit for mounting the bottom drive. So unlike the 2 piece design, where you need to slide the brackets around to make the holes fit. The top drive mount using the screw holes on the side.
