Spring Arm Strength Hand Gripper Power Twister Resistance Bend Bar for Fitness Chest Forearm Strength Training 20/30/40/50KG

🔸Colors: Red, Blue🔸Product size: 20 kg/30 kg/40 kg/50 kg🔸Material: High Elastic Fiber🔸Package Included: 1 *Power Twister Bar📣【Instructions for use】1. Stand with your feet shoulder-width apart, bend your elbows crosswise, and bend the spring with your left hand. Then, bend your left elbow and bend the spring with your right hand.2. Stretch your arm, bend the spring, and slowly relax it. Repeat several times.3. Bend your arm forward and slowly relax the spring.4. Bend down and bend your arm toward the spring.5. With both hands behind you, grasp the spring firmly, straighten it, and slowly bend it.6. Confirm the exercise. The bodybuilding results are remarkable.📢Notice📢📌Before use, please check that the parts of the arm control device are stable and not loose.📌Please choose an arm strengthener that suits your fitness level to avoid muscle strain.📌When using, fasten the seat belt on the armrest handle at the wrist.📌When using, choose a relatively spacious sports field to avoid hand injury.📌 Please allowed 1-5mm differences due to manual measurem