Arm Exerciser - Adjustable 10-200kg Hydraulic Power, Home Chest Expander, Shoulder Muscle Training Fitness Equipment, Arm Enhanced Exercise Strengthener. 【Adjustable Resistance】Rotating the knob to easily adjust the resistance, rang 10-200kg free adjustment. Just rotating the knob, resistance can be adjusted, faster than car shifting. 【Durable Material】Double-layer steel tube is firm and durable. The material is strong and more realistic. The training machine has 200kg bearing capacity. 【Stable Triangle Structure】Stable triangle center design makes the exercise more stable, which is a safer and more scientific structure. 【Safe Fitness】 Professional micro-rebound and refuse to take profiteering rebound. Completely solve the safety hazard for safe fitness with no hurt and safe micro-rebound. 【Easy Storage】The buckle of the handle's bottom is easy to store and convenient to carry. The user-friendly designed rear buckle can be fixed after folding.