Ultimate Arm Trainer Adjustable Chest Expander Arm Exerciser Shoulder Muscle Training Fitness Equipment, Upper Body Strength Training Machine. Portable Spring Resistance Home Fitness Equipment...

Build a powerful chest with professional-grade chest workout equipment. More than a standard Twister Arm Trainer, this dynamic arm trainer precisely targets muscle groups to accelerate growth and enhance definition through chest clip muscle activation. Perfect as both a chest trainer for men and arm trainer for women, it strengthens chest, arms, sh..