EAST MOUNT Twister Arm Exerciser: 22-440lbs Adjustable Hydraulic Power w/Counter

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 440 lbs 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.

eBay