Use this for De Quervain's Tenosynovitis in my hands- the large ball to squeeze/ release, the medium ball to massage my hands, wrists, and up forearm, the little ball to really get in the thumb pad muscles/ tendon. Do this daily and it’s helping. I’ve also used the small ball on my neck muscles, into shoulder, and back of head where my neck spasms. And the medium ball along my shoulder blades on my back rubbing against a wall. Gives me relief from muscle pain
I did not receive the shipment, it was too late and also almost 20 days and no refund.