A shoulder tender also called beef shoulder petite tender, beef shoulder tender petite roast, bistro filet, rat or teres major steak is a US cut of beef of the teres major muscle from the blade of the shoulder (chuck). It is one of the most tender beef muscles and is said to be "white-tablecloth quality", being a similar quality to filet mignon, but less expensive. It is seldom used, as it requires skill to extract.