Features: Adjustable Power-Twister: It can adjust different resistors by turning the resistance-knob, which is easier to use than traditional spring devices. Adjustable forearm trainers from 10 to 200 kg with 1 to15 levels. MULTIFUNCTIONAL STRENGTH: Perfect for simultaneous exercises of your wrists, arms, shoulders and chest. Develop your handle, strengthen your fingers and wrists and increase upper body muscle strength. Reliable Structure: With a stable triangular structural design, it keeps the power-twister in a stable state, making it a safer and more scientific structure with micro-rebound. The force applied during use is evenly distributed across the triangular frame, reducing strain on joints and components. Enhanced Stability: Built from thickened carbon steel, this chest expander does not easily deform or break. Anti-slip handles with wear-resistant texture not only improve stability but also boost-endurance. The shape of the handle fits naturally into the contours-of the hands and reduces fatigue. User-Friendly Design: Quick setup and adjustment. Notice: *Actual color may be slightly different from the image due to different light effect *Please allow 1-3cm deviation due to manual measurement Description: Materials: Nylon plastic, carbon steel Package List: 1x Arm Strength Trainers