Primary muscles worked are the trapezius. Secondarily are the shoulders and fore arms.

Use the short straight bar connected to the lower pulley. Stand with your feet shoulder wide apart. Hold the bar in front of your body with your arms fully extended and your palms facing in towards your body. Pull the bar close to your body up towards your chin. Keep your elbows higher than your wrists during the entire movement.

You can also perform this exercise by using the squat bar attachment connected to the pressing arms.