Product Description Feature: 1. Safety: There is no danger of spring breaking, and it will not rebound and hurt yourself. 2. Comfort: The ergonomic PU handle at the bottom is wear-resistant and non-slip, and it is comfortable to hold. 3. Stability: The fully enclosed hydraulic cylinder has stable resistance and will not weaken with the passage of time. 4. Science: Using the unique principle of safe hydraulic adjustment system, even if the resistance is changed, the arm opening angle and arm movement will not change, and the exercise can be carried out more scientifically and effectively. 5. Convenience: There is a storage buckle at the bottom of the handle, which is convenient for storage and carrying. Humanized design. The tail buckle can be fixed and stored after being folded. Advantage Bottom storage buckle, easy to carry. Fully enclosed oil cylinder design, lasting strength. PU soft rubber gloves, wear-resistant and non-slip, high comfort. The triangular center design greatly improves safety. Refused to violent rebound, to solve safety problems during exercise. 22-440lb any resistance adjustment to meet different needs. One-click easy resistance adjustment to meet all strength training. Easy Storage Durable The double-layer steel pipe design is strong and durable. Convenient storage There is a buckle at the bottom of the handle, which can be buckled when not in use. Convenient to store and carry. Comfortable handle The handle is made of soft PU material, which is comfortable to grip, wear-resistant and non-slip. Train different muscles in different 1. 1-4 levels, thickness changes slightly. 2. From the 5 stages, the change in strength began to be noticeable and the 6-8 steps can reach about 50-80 kg. 3. 9-15 levels the force significantly, about 90-150 kg. 4. 16-20 levels are the ultimate challenge, about 160-200 kg. Specification: Material: carbon steel, PU, hydraulic cylinder; Adjustable range: 10~200kg; Size: 43*16*5cm; Purpose: Strength training of chest, arms, back, etc.; Color: Blue and Black; Packing list: 1 * Hydraulic Arm Trainer Warm Tips: 1.The buckle are just for holding the two arms of power twister together,please don’t use it as a handle,avoid the buckle falling off and power twister falling on you. 2.Please choose the intensity that suits you so as to avoid muscle strain. 3.Not recommended for use by children,pregnant women and those who feel unwell. 4.Please keep out of reach of children and pets to avoid hurting your baby. What’s Hydraulic Arm Exerciser Advantages？ 1.Won’t rebound and hurt yourself. 2.There is no danger of the spring breaking. 3.Totally-enclosed hydraulic cylinder which offers you stable resistance strength,will not weaken over time. 4.With unique safe hydraulic adjustment system principle,even if you change the resistance.