Casafoyer 4 Bay 2.5in SAS/SATA HDD/SSD Mobile Rack Enclosure for 5.25" Bay (with Keylock) | ToughArmor MB994SK-1B - Pack of 2 Pack of 2 — combo value pack. Supports up to 4 x 2.5" SATA/SAS HDD/SSD into single external 5.25" drive bay. Support SATA 6Gbps or SAS 12Gbps (single channel) Eagle-hook lock system & custom made metal key lock keeps drives secure within the enclosure. Removable EZ Slide Mini Tray system for easy maintenance.