What is this thing I found in my bumper?

[owens.levi]

Hey all,

While replacing my fog light bulbs I found this thing just rattling around loose in the space behind the bumper on the driver's side. Anyone know what it is?

 

[maxdef]

Front bumper bracket - 5214635050. I think it just helps with support and shape.

52146-35050 Genuine Toyota Part