it turns out Reddit has a "what is this thing" page... and you can post photos of things you are curious about. So a guy wanted to know what these things in his dad's tool box were.

and that's where the WTF of the month comes along. Seems these are either nipple pumps, or wine cork pumps.

https://www.reddit.com/r/whatisthisthing/comments/9oarmy/found_in_my_dads_toolbox_no_idea_what_they_are/
https://www.reddit.com/r/Wellthatsucks/comments/9oguog/finding_out_whats_in_your_dads_toolbox/