Akasa AK-HDA-03 support frame for hard disks 6.4 cm (2.5 inches) in a 8.9 cm (3.5 inch) shaft housing (accessories)
Basically, very valent holding frame, inexplicably, the diameter of the mounting holes is not standard of 3.5 inch HDD. Thus, it can lead to problems if one is dependent upon installation in housing on special screws and who wants to unpack the drill