Our Rig Brackets are designed of factory spec hardened industrial aluminum and are the easiest solution to outfitting your 3U DIY Eurorack case. These 3U brackets mount inside your case and can be used with any length rail. Contour each row to curves or stack for uniformity. Counter sunk holes on each side make for flush mounting of hardware. Comes with rail end screws and short wood screws. Also work with Vector brand rails!