I wanted a hard form briefcase for making my $35 Raspberry Pi computer transportable so I could show students the difference between my KIM transportable from 1977 and today's  . The office supply stores only seemed to have bags of various types. So this is working great for me. Why 4 and not 5 stars? The aluminum case arrived with a dent on the upper left edge, but what the hey, I might dent it more as time goes by.  :-)