brass ring

listen to the pronunciation of brass ring
Английский Язык - Английский Язык
Figuratively, a prize or goal. Often used with respect to employment goals e.g. promotion, better job, etc

He's going for the brass ring.

a rich opportunity or a prize; "he missed the brass ring at the Miami convention
An opportunity to achieve wealth or success; a prize or reward: "missed the brass ring of American success" (Lewis H. Lapham)
brass rings
plural form of brass ring