I found this object while unpacking. I know what it is, even though I haven't had reason to use it in, oh, 16 years or so.
Do you know what it is?
(The thing on top is a plunger which presses straight down, and springs back up when released.)
Identified first by ![[livejournal.com profile]](https://www.dreamwidth.org/img/external/lj-userinfo.gif)
kyroraz in comments!![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}