PROIRON Power Twister 10~200kg, Adjustable Hydraulic Arm Exerciser, Forearm Training Chest Exerciser for Arm and Forearm, Biceps and Chest Strength Training

["Adjustable Resistance: Turn the knob left or right to increase or decrease the resistance. The range is 22-440 lbs.", "Strong and Sturdy Material: The hydraulic power twister is made of high-density dual-carbon steel, not easy to deform or break. The bottom features an ergonomic PU handle that is wear-resistant and non-slip, providing a comfortable grip.", "Hydraulic Pressure Protection: Unlike other spring-based trainers, our bicep training device provides stable resistance strength that does not weaken over time. The angle of the arms remains the same, ensuring a safe workout.", "Multifunctional Strength Training Device: Perfect for training your wrists, arms, shoulders, chest, and back simultaneously, developing your grip, strengthening your fingers and wrists, and increasing upper body muscle strength.", "Easy to Store: The buckle at the bottom of the handle is easy to store and convenient to carry. The humanized rear buckle can be fastened after folding."]