ReadyRails sliding rail kits from Dell are designed to install without tools in square hole and unthreaded round hole racks only. Adapter brackets can be installed in a threaded hole rack to support ReadyRails sliding rail kits. These brackets are optimized to limit the offset of the server beyond the EIA rails to less than 18mm. They can also be used with the Dell rack-mount UPS ReadyRails static rail kit. This product is compatible with the following systems: - PowerEdge 1950 - PowerEdge 2970 - PowerEdge M605 - PowerEdge M805 - PowerEdge M905 - PowerEdge R200 - PowerEdge R210 - PowerEdge R300 - PowerEdge R320 - PowerEdge R420 - PowerEdge R510 - PowerEdge R515 - PowerEdge R520 - PowerEdge R620 - PowerEdge R710 - PowerEdge R715 - PowerEdge R720 - Poweredge R720xd - PowerEdge R805 - PowerEdge R810 - PowerEdge R815 - PowerEdge R820 - PowerEdge R900 - PowerEdge R905 - PowerEdge…