Latissimus, Trapezius, Shoulders, Core, Chest, Triceps, Back
Grasp two gymnastic rings at approximately shoulder width and press into them to achieve full extension. This is the start position, same as in a traditional dip.
Keeping your shoulder blades and core stable, descend so that your upper arms move away from your body to the sides, while maintaining a vertical forearm position.
Descend until your upper arms are nearly parallel to the floor. Reverse the movement under control.