Wrist Power Ball Self Starting Male Grip Power Ball Arm Power Wrist Metal 200 Silent Centrifugal Fitness Wrist Power Dev

R$ 239,90
Descrição do produto

Specification:

Material: spring steel

Configuration: carton packing safety rope

Package size: 7cm*7cm*5cm

Individual weight: 0.4kg


Feature:

1Finger exercise, wrist strengthening, arm comprehensive exercise

2Built-in automatic elastic device, a push and put, can easily start and control the strength

3Mechanical power does not require a power source

The centrifugal force generated by the interaction between the wrist rotation and the inner ball core keeps the ball spinning at a high speed