The Rocstor Rocmount Pro-M RME Rack-Mounting Kit comes with a cradle that is designed to hold your Apple Mac Pro and slides into a rack system by utilizing the included docking bracket. With the bracket installed on the rack, this kit occupies the space of a 4RU system and lets you quickly remove the cradle and Mac Pro from its fixed position. The 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.