Narrow, shoulder-width dips primarily train the triceps, with major synergists being the anterior deltoid, the pectoralis muscles (sternal, clavicular, and minor), and the rhomboid muscles of the back (in that order). Wide arm training places additional emphasis on the pectoral muscles.
The Shoulder Press builds strength in the deltoid and arm muscles.
Motion developed: chest press.
The exercise works the pectoralis major as well as supporting chest, arm, and shoulder muscles such as the anterior deltoids, serratus anterior, coracobrachialis, scapulae fixers, trapezii, and the triceps.
Motion developed: bench press.
Exercise machine intended to strengthen abdominal muscles by doing bodyweight exercises.