Found this today , what is it?
See pic in my registry...second one down....
second pic...
Ryan1
Zomg it's a brake rotor!!!! OH NOEZZZZ a microscopic rotor!!!!
I think it's a brake rotor... but I'm just going on instinct.

Sold 6/30/06.
It looks like a brake rotor that is starting to get too thin and need to be replaced... either that or its warped slightly causing that "hot spot" effect where the pad has a higher coefficient of friction against the warped part of the rotor....
Just going by instinct as well