NON-SLIP AND DURABLE: Portableu Shape Twister Arm Exerciser Chest Workout Sae 5160 High-Carbon Steel is Used to Provide Linear Resistance, Uniform Force Throughout The Action, U Shaped Twister Arm Trainer Precise Rebound, Avoiding The "Stuck Feeling" of Traditional Springs, Power Twister Bar Double-Layer Tpr Soft Rubber Wrapping to Prevent Sweaty Palms from Slipping, And Still Able To Firmly Grasp, Zero Tenderness Design.
