The P160 is a study in silver, with its aluminum panels highlighted by a front bezel with a chrome finish on the borders. If you saw this design on a classic beige computer case, you might think it looked boxy, but the aluminum panels complement the design. The result is a package that says "function before fashion" yet still manages to look good in an understated way. The two circles near the top of the left panel are the latches that secure the panel. To remove the panel, grab the two vertical handles in the circle and turn them a quarter turn clockwise, then pull the top of the panel out and lift it off. Look closely at the rear latch, and you'll see a small circle in the middle of the handle. This is the keyhole for the case lock. It's a small thing, but the "circle within a circle" design is a nice touch.