Help identifying

[Meldal68]

I found this small iron item 1' from where I lasso found an eagle breast plate. It has a round spiney part with a hole in the center on one corner and one side of the square has a dimple. Any help identifying would be greatly appreciated. It was located 1' from the breast plate in a remote wooded area with no trash located just relics

 

[A2coins]

Looks like a miniature spur lol

 

[cudamark]

Or a tiny lighter......