Brand: Jandecfit

Make sure this fitsby entering your model number.
【Adjustable Resistance】Jandecfit power twister arm resistance can be adjusted,the range is:22-440lbs,the resistance strength of this twister arm exerciser can be adjusted by rotating the knob,easily turn the knob left or right,increase or decrease the resistance to meet your needs in different training stages adjust to the suitable resistance as needed to make exercise more effective and avoid muscle strain.
【Hydraulic Pressure Protection】Arm muscle training machine uses hydraulic adjustment principle to make chest expander safer and more durable,in contrast, using spring power twister is very dangerous 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 Arm Forearm Exerciser Chest, which is safe, stable and will not rebound or hurt yourself!