Black Box RMT011 PATCH PANEL HINGE KIT, 1U (1.75INH) Patch Panel Hinge Kit, 1U (1.75"H) Use with any rackmount panel for easy and quick access. The black steel hinge mounts between one end of your patch panel and a standard EIA rail. The other end of the patch panel mounts to the opposite rail. For convenient maintenance or modifications, just unscrew the patch panel mounted to the rail and swing it out. Choose from 1U to 4U hinges.