The Rocstor Rocmount Pro-M RM-Dual Rack-Mounting Kit comes with two cradles that are designed to hold your Apple Mac Pros and slide into a rack system by utilizing the included docking bracket. With the dual-system bracket installed on the rack, this kit occupies the space of a 4U system and lets you quickly remove both cradles, which each one holding a Mac Pro, from their fixed positions. Each cradle features two straps that secure the Mac Pro, while providing access to the ports. To protect the Mac Pro's chassis, the cradle and straps are lined with rubber padding. In addition, a cable management system is onboard to tidy up and prevent accidental unplugging of the wires.