one pair chinese health balls baoding iron ball massage balls for hand therapy q0115

features: ootdty 100% brand new and ★china's traditional hand sports equipment has a history of thousands of years ★the method of use is very simple: put 2 or more iron balls in your hand and let it spin ★the styles are divided into solid iron balls and hollow iron balls, the hollow ones will make a knocking sound, and the solid ones will only have the sound of collision ★keep your hands, fingers, wrist, and arm healthy. recommended by hand therapists, using baoding balls can