90mm Metal Post Cap - Stainless (Satin)

Where would you normally use metal post caps?
On top of a 90 x 90mm fence or stair post to dress it up.
It is suitable for both interior and exterior use.

What is it made out of ?
304 grade Stainless Steel in a satin (brushed) finish.
The photo may look like it is a mirror finish, but it is actually more of a satin (brushed) finish.

Note:
Please note that no fixing screws are provided.