TSA shaving mirror out of a hard disk drive (what are those shiny platters made out of anyway)?

Elmo · 2010-06-22T04:48:56+00:00

What are the shiny CDROM-sized platters in an old desktop disk drive madeout of?I glued two of them together so that the offset covered the center hole touse as an indestructable traveling shaving mirror.A friend said they won't pass TSA security but they're not sharp. They arejust really shiny and really flat. What are they made out of anyway?