Hit the nail on the head.
[Slang] HIT THE NAIL ON THE HEAD. - Master the Art of Accurate Expressions
Perfectly correct.
When someone says you "hit the nail on the head," it means you have said something that is precisely right or perfectly correct. Imagine trying to drive a nail into a piece of wood if you hit the nail squarely, it goes right in, and your job is done well. Similarly, in conversations, if you hit the nail on the head, you have accurately addressed the issue or made an entirely accurate statement.
Example Sentences
You really hit the nail on the head with that explanation.
You perfectly identified the main point with that explanation.
His comment hit the nail on the head; it's exactly what we were thinking.
His comment was exactly what we were thinking.
By addressing the underlying issues, she really hit the nail on the head during the meeting.
By addressing the underlying issues, she perfectly identified the main point during the meeting.