For a full arm workout, you can try the action.
Alternating Military Press
How to: Start kneeling with right leg forward, tailbone tucked and core engaged. Bring elbows up and out so arms form 90-degree angles, like a field goal, with dumbbells in hands. Press right arm up to straight, until right bicep is near right ear. Lower to down to return to field goal position, then repeat with left arm. That's one rep.
If you want to try other methods, you also can try this.
This is a pair of Heavy Suspension Rip-Resistant Sling Straps. It can also help you to do a full arm work.