Rear rackrail kit for the DWR Series Wall Racks. A pair of 21RU Forward Rackrail unleashes your inner speed demon Includes a square hole that unlocks the ability for all of our Forward panels, vents and cable management to be clicked in without using ANY rack screws! The inside of the rail provides cable management lacing so you can easily run all your interconnections in the rack without having to improvise tie off points. Compatible with tool-free Forward cable management accessories for an even faster cable routing experience!