Hi guys, I know you like these ones, anyone who can help me identify these…

They are described as "Broaches" the cheap price lured me to them, even though I have no idea what they do. Certainly not the type of broaches i'm used to.
They are probably clagged in a lot of ancient preservative, but they have a tapered square end one side, and a tapered pentagonal shape the other way. Maybe they are for pressing square/ pentagonal holes in wood working?
Michael W