Need to know that? or anything about it?

Yeah, it's basically useless by itself.
What kind of plane you'll be using the prop on matters. The engine matters. Your flying demands matter.

Matter of fact, your engine might not be able to turn 12K with that prop, or would have to be throttled back to 12K.

But it might give some comparative value if you are able to compare to other props on that engine. That is, if you can read thrust numbers, and can do them on the same day (or know how to adjust for density altitude etc)

Nah, not much value in those numbers by themselves. Want to know if that prop works better than others? Try 'em at the field. You'll know in just a couple of flights.