holes in keychains?

[sticky-glue.livejournal.com]

This may sound silly, but where can you find metal rings (I'm not sure what they're called) for keychains? The part that the actual keyring part goes through. And, how do you attatch them?

(For mental help: http://i7.tinypic.com/26264pf.jpg - above the owl)

Sorry for text only. Thanks.

**Just to clarify - I'm not asking about the top ring (the spiral) that you use to attach the keyring to something, like a backpack. I'm asking about the tiny metal hole that is actually in the felt. Sorry for the confusion!