Power Twister Arm ExerciserAdjustable Hydraulic Pressure 22-440lbs Arm Muscle Training MachineArm Enhanced Exercise Strengthener for Men and Women Home Gym Fitness EquipmentAdvantages of Our Adjustable Power Twister: 22-440 lbs Arm Muscle Training Machine: Suitable for both male and female fitness enthusiasts. Adjustable resistance to meet your needs. Safe and Controlled Rebound: Professional micro-rebound mechanism avoids violent rebounds and potential injuries, ensuring a safe workout. Durability: No worries about spring breakage. The fully enclosed hydraulic cylinder provides stable resistance strength that does not weaken over time. Consistent Resistance: The unique safe hydraulic adjustment system ensures that the arm opening angle and movement remain unchanged even when resistance is adjusted. Easy Operation: Comfortable PU soft rubber handle, wear-resistant and non-slip. Handle storage buckle for easy storage. Cost-Effective: No need to buy multiple resistance tools. This single machine adjusts from 10-200 kg (22-440 lbs), meeting the fitness requirements of different stages. Features: Stable Strength: The fully-closed hydraulic cylinder keeps the strength constant and the arm strength device stable. Adjustable Resistance: Easily adjust different resistances with the power switch. Fixed Triangle Center Design: Ensures stable and effective muscle training by maintaining the same exercise stroke and angle. Packaging Contains:1 x Arm Power Chest Training Machine Adjustable