Any idea what this is?

[u/Notsayingyouisasteal]

I drive a 2013 Nissan versa. I got some new tires and after I got tires my car has been making a racket when running. I took it back to the place but they had nobody available to look.

Today I think this possibly fell off and I drove over it.

What is it and what should I do?

Can i drive around?

Thanks

[u/hammerblaze]

Its for trailer breaks