I think they opened sardine cans
They were also on canned corned beef.
Gotta be it!
Do you vaguely remember these because you’re too old or because you’re not old enough?
These work perfectly to open bathroom doors. The kind with a round button you push in order to lock it. Sometimes people would open the door all the way when leaving the bathroom so the button would be pressed in and causing the handle to be locked. Then sometimes the wind slammed the door shut… well, time to go get “the key”.
Saw thumbnail, assumed they were the little screwdriver like things you use (in the US) when your sibling locks the door to your room. But no, I haven’t seen these in a while because I am not a cartoon mouse tempting a cartoon cat towards a traumatic brain injury.
I remember the tin breaking and having to get pliers to finish opening the can and slicing my finger open because it’s like a razor blade.
