The RackSolutions 3U Tool-less Universal Rail 28in Depth is designed for quick installation and versatile use. Its tool-less design allows for fast setup into square hole 4Post racks, accommodating a mounting depth from 28 - 30" (711 - 762 mm). With a robust 200 lbs ( 90.7 kgs) capacity, it supports a wide range of equipment and is compatible with major brands like Dell, HP, Apple, and Lenovo. The rail kit also includes a tool-less wirebar for effective cable management, making it a practical alternative to OEM slide rails.