Power Twister Arm Forearm Exerciser, Spring Arm Force Bar, Chest Expander with AAdjustable Resistance: The resistance can be adjusted by turning the knob, which is simple and convenient, ranging 10-160kg. When you rotate upwards, the resistance increases and when you rotate downwards, it decreases. Adjust to the appropriate resistance as needed to make the exercise more effective and avoid muscle strain Double Durable: Our arm strength trainer is made of double thickened carbon steel with double strengthened spring thus ensuring the endurance without deformation during working. Safety: The unique golden ratio triangle support will always keep the power twister in a stable state to ensure the safety for using. In the meanwhile the ergonomic non-slip handle provides a better user experience concerning comfort and safety. Sophisticated Design: triangular stability to provide more support while being safe. Upgraded visible strength scale to figure out and adjust strength level as needed. Multi-functional digital display to quantize different data. Effectiveness: great impact on muscle training, strength training and aerobic fitness. Suitable for beginner or pro exerciser. Powerful to help completing more flexible postures to train arm and chest muscles tfore shaping perfect and charming body. All exercisers dream to have a charming aesthetic body but few succeed. Why? For they didn’t find the very apparatus for them... ➤: Thanks to our resistance adjusting Unit, changing strength (ranges 10-160kg) become easy and convenient. No matter at which power level you are, it helps to yours quickly and accurately. Also efficient in gradually adding strength according to your need and plan.➤: Our arm trainer trains not only arms...according to different positions and postures, it will also render a remarkable promotion on chest, abdomen, forearm and back muscles. Buy and Use it, Boosting your overall muscles and figure.➤: This upgraded trainer is equipped with an exclusive LCD display. Four main features are available including training time, count, frequency and calory consumption.The quantization of the features assists on controlling the training cycle in order to improve the efficiency and effectiveness of the training.➤: we are so confident about the quality of our products that we offer a 12 MONTH WARRANTY. Feel free to contact us if you get any questions. We will get back to you at the speed of light. Once, with rather low possibility, you are not satisfied with your order, a replacement or a full refund will be always available.❤ Payment DetailsWe currently accept payment via PayPal only. Once payment is cleared, we will dispatch your shipment within 1-3 business days. Please refer to the "Shipping" tab for more information regarding shipping speed to your destination.Return PolicyAs our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected. If you are not satisfied with your purchase, please contact us within 30 days of receiving your order to process a return.