The Synology RKS1317 v2.0 is a sliding rail kit for securely and neatly mounting a Synology RackStation in a 19-inch server rack. The sliding rails allow you to pull the NAS forward for maintenance, such as replacing drives or checking cables, without removing the unit from the rack. The kit supports most 1U, 2U and 3U models and fits racks with a mounting depth of 610 to 890 mm, with either square or round mounting holes.