It’s funny how some inventions just come along: take spring plungers? You might wonder what on earth these are, and why would anyone need one.
But spring plungers come in a variety of sizes for a variety of purposes and for a variety of situations. They provide controlled accurate force with the spring. And a pinball game, for example, just wouldn’t be fun without the release mechanism provided by the spring plunger.
Can you think of any more examples of where these devices are useful?