Two bay 3.5” HDD cage kit for the Strix Helios series. The trays are tool-less drive tray design for 3.5" drives, simply attach them to the tray and slide them into the cage without using tools or screws. The 3.5-inch drive trays can accommodate 2.5-inch drives but you would need to use screws to secure them in place. The design ideal is for use with ROG Strix Helios cases which end users request to support more storage demand.