Dell PowerEdge 2.5" Drive Caddy

This is a drive tray for a Dell PowerEdge server, it allows you to simply press the drives in (it doesn't use a locking mechanism, it's very simple) but if you need trays and can't get a hold of any it works very well.

You should install it seemingly upside down (take a look at the pics), the tab points down and the lower half of the drive bay is what holds the drive and this tray in it.

Print it so that the cross member support is down on the print bed and the tab points up. I used plain PLA and it is very strong and solid even though it's thin for me, the drive snaps into place, so there are no screws needed.