Since you don’t attach a picture or the exact text of the first comment, I don’t know what specific object it is.

However, this type of “Do you know what it is? The answer is in the first comment” type of post is very popular on social networks (e.g. Facebook). It usually involves:

Clickbait and engagement bait: This is how sites entice people to click on comments and increase the reach of the post.
Historical, unusual or vintage objects: Old kitchen utensils (e.g. from a cherry pitter to an old grinder), special craft tools, bizarre inventions from the last century or mysterious natural formations.

If you want to find out exactly what it is, upload a photo of the object here or describe what it looks like, and I’ll be happy to help you identify it.