What is this?

I came across these working on my 7MGE.

http://i11.photobucket.com/albums/a194/Yellowthirteen/Mysteryparts001.jpg

They were just laying in between the flywheel and the crankshaft. I felt around inside but it didnt feel like anything was missing. Theyre pretty beat up like they broke off of something.

(sorry bout the pic, low lighting and no batts for the flash)