Main Features : ◊ High-density double-layer carbon steel tube ◊ Ergonomically designed PU handle ◊ Buckle of the handle's bottom for easily store ◊ Adjustable resistance (22-440lbs), meets the fitness requirements of different stages ◊ Easy to use, just rotating the knob, resistance can be adjusted, faster than car shifting ◊ Totally-enclosed hydraulic cylinder offers you stable resistance strength, will not weaken over time ◊ Hydraulic pressure protection, there is no danger of the springback, won’t rebound and hurt yourself ◊ Golden ratio triangle structure with 10 reinforcement rivets, exercise more stable and safer ◊ Wide application, suitable for beginner or veteran, indoor or outdoor ◊ Perfect for exercising your wrists, arms, shoulders, chest and back at the same time Specification : -Material: Carbon Steel, PU&Plastic Handle, Hydraulic Cylinde -Color: Blue / Red -Size: 16.9*6.3inch -Product Net Weight: 2.5kg / 5.5lbs -Adjustable Resistance: 10-200kg / 22-440lbs Notes : 1.Pls choose the intensity that suits you so as to avoid muscle strain. 2.Not recommended for use by children, pregnant women and those who feel unwell. 3.Pls keep out of reach of children and pets to avoid hurting your baby. 4.Pls don't use it as a handle, the buckle are just for holding the two arms of power twister together, avoid the buckle falling off and power twister falling on you.