Yet Another, What is this?

[Eddyde]

I bought this at a yard sale for $1 I have no idea what it is?
No markings on it at all.
Pulling the trigger advances the rod forward.

 

[Dave Smith]

unscrew the end piece and see if there is a small hammer inside for peening, or driving a nail.
Dave

 

[francist]

Looks like an old version of one of these…

 

[Janderso]

Looks like an old version of one of these…

View attachment 447026

It sure does.
I bet you nailed it.

 

[Ulma Doctor]

Definitely a Tire Repair Plug installer

 

[Eddyde]

Tire Repair Plug Installer, it is. I knew I'd get the answer here, Thanks for your responses!