Wrist Ball Self-starting Gyroscope Powerball Gyro Power Hand Ball Muscle Relax Arm Wrist Force Trainer Fitness Sport Equipment

Features:

–Easy to use.

–Mechanical design, no power required.

–The compact design can be carried around, whether in the office, gym, or at home, it can be used as a toy to relieve stress at any time, and can also exercise arm muscles.

–Exercise your wrists and hands.

–The hand booster ball is a centrifugal force generated by the interaction between wrist rotation and internal rotation core, which can maintain the high-speed rotation of the core, promote blood circulation, increase the strength of fingers, wrists, hands, forearms, biceps, triceps, ligaments, and shoulders, and restore muscle strength.

–Automatically start the design.

–The operation is very simple, just push the iron core in the direction of the arrow, activated by the internal spring. Please wear a dedicated wristband during exercise to ensure that the wristband will not be lost due to excessive force.

–Durable and sturdy.

–The ball core is made of zinc alloy material and has no strange vibrations.