FOME 20kg Power Twister Spring Resist Exerciser Bar Arm Chest Muscular Strength Train Black Practical Power Twister Flexible Strength 20kg Arm Chest Shoulder Spring Exercise Fitness Training Bar Arm Blaster: Perform curls with your biceps and forearms. Full resistance is provided all the way through unlike dumbells, giving you maximum resistance throughout the exercise. Chest Workout: Exercise your chest by bending the FlexBar inwards, similar to pectoral flys, providing resistance through your entire motion. Back and Shoulders Workout: Flex your back and back shoulders by squeezing the FlexBar towards your middle back.