EAST MOUNT Twister Arm Exerciser - Adjustable 22-440lbs Hydraulic Power, Home Chest Expander, Shoulder Muscle Training Fitness Equipment, Arm Enhanced Exercise Strengthener.Adjustable ResistanceRotating the knob to easily adjust the resistance, rang 22 440 lbs free adjustment. Just rotating the knob, resistance can be adjusted, faster than car shifting. Durable MaterialDouble layer steel tube is firm and durable. The material is strong and more realistic. The training machine has 440 lbs bearing capacity. Stable Triangle StructureStable triangle center design makes the exercise more stable, which is a safer and more