This adjustable lanyard attaches to an inflatable smart ball, catering to various needs. It is a top training aid option that can be placed under the armpits or between the forearms.
Scientific and reasonable design and construction, easy to use, inflatable ball can adjust the size, neck rope can adjust the length
Great for beginner to practice and professional for teaching and improving swing performance
Can be used to correctly grasp the swing posture, fix and strengthen the arm distance muscle memory and avoid arm bending