What is this?

[funnybone07]

 

[MTJosh]

If the end is shaped(square/hex) good chance it’s for turning on/off valves on old heaters or gas fixtures

 

[too_pointer]

It looks like a religious item !
too_

 

[flamsteed]

It looks like the key to an alarm clock. Is it hinged?

 

[spence]

Very cool. I saw bat wings at first glance.