Cable straight arm pulldown. An isolation exercise. Target muscle: Latissimus Dorsi. Synergistic muscles: Teres Major, Lower Pectoralis Major, Pectoralis Minor, Posterior Deltoid, Levator Scapulae, Rhomboids, and Triceps Brachii (long head only).

Original article and pictures take http://weighttraining.guide/exercises/cable-straight-arm-pull-down/ site