To answer your question, the Antec Performance Plus 660 AMG is what I have, it has a lock on the side that really can't be opened without the key (comes with two). It is like those locks that used to be on PC's that kept them from booting up. It is a great case, comes with 2 case fans and a dust screen for the front, and the excellent Antec Truepower 330 watt. Very quiet. It IS a heavy case, though.