yeah, all are made of alluminum.
While its working, try to and touch it with the tip of ur finger with a gentle amount of pressure, you'd feels a tingly static which is fun to play with and try this with no shoes on and its gets shorted after a while of playing with it.
I've had this experience twice with the laptop hard disc with the Dlink cover( its a pocket able size )(the first time just the electronics on the adapter got ruined, but the second time the HDD got ruined just shows parrtitions instead of 4 and windows gives a delayed write error), dont know how the larger drive(A CPU's HDD) would do coz i've never experimented on that, i've been using the larger ones without wrecking them!