From their site

The ClearPC® Secret Agent (C.S.A.) is a lightweight, small-footprint, tough, all-clear acrylic computer case for Full-ATX and Micro-ATX size circuit boards using a unique unibody construction found in no other device. It is intended for maximum portability, full-size computer carrying convenience in a tight rounded package. No external edge on the Secret Agent is square and it utlizies only two thumbscrews in its construction: the remainder of the enclosure is factory assembled using a molecular bonding agent.

Other notable features include a built-in hard drive cooling tray, a contoured, low-profile, 3/8″ thick acrylic carrying handle, a very small Full-ATX footprint measuring just 6 1/4″ W x 14″ H x 18 1/2″ L and weighing in at only 4lbs., realistic briefcase styling, 4 expansion bays (2 CDROM and 2 hard drive) with an integrated briefcase door catch.