I bought a mainstays mirror from Walmart. The sticker on the mirror said I needed their hardware to hang it up which I couldn't find in store. I didn't realize before trying to screw in the screws, that the length of the screw is just as long as my mirror is wide. As I was applying pressure to screw it into the back I heard a crack. So it didn't work out, and I actually put a crack in my mirror from one side to the other.
'Yay for wasting money!'