This is one of the best thing’s you can do with a 5.25″ space, it basically locks your usb connectors inside this box so that you can’t take them without a key.his device is installed in one of your 5.25” bays and gives you four USB ports. What it does is that there is a door that swings shut over the ports, and locking them in. There is just enough room for your cable to stick out, but not for the plug to come through Too bad i have a laptop, would be great for dreamhack, everybody hates getting their mouse stolen during a lan party.