Adjustable ResistanceYou can choose different resistance strength that suits you by rotating the knob left or right. One button adjustment intensity.22-330lbs stepless adjustment. Gradually increase resistance and strengthen their own strength training to achieve muscle strengthening. Arm exercise equipment can help reduce arm fat, abdominal fat, and increase the gathering effect of the chest. Perfect for reducing fat and weight and increase strength training. Strength Fitness Training MachineFixed triangle center design, exercise is more stable,safer adjust the angle, the opening angle is unchanged, the exercise stroke is also unchanged and it is more effective for muscle training.Perfect for exercising your wrists,arms,shoulders,chest and back at the same time,developing your grip,building strength on your fingers,wrists,and increase the muscle strength of the upper body. Hydraulic Pressure ProtectionResearch shows it is very dangerous to use spring power twister,because its springback is violent,easy to hurt you;the spring in the middle will easily pinch youself;the spring is prone to break after prolonged use.Please throw away those spring power twister,try our hydraulic power twister which is safer and more durable becasue of the patented hydraulic adjustment system principle.There is no danger of the spring breaking,wont rebound and hurt yourself Strong and Sturdy MaterialThe hydraulic power twister is made of high-density dual-carbon steel, reinforced with a ribbed design, and reinforced with 10 screws. Very metallic, not easy to deform and break. The core is a fully sealed hydraulic cylinder, which has a simple structure, reliable operation, adjustable resistance, and is very safe. It can provide stable resistance strength and will not weaken with the passage of time. Safe Use TipsRemove the"storage buckle" before use,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