Three different hard rings to strengthen the hand muscles. With these Squeezers the muscles can be strengthened actively and while playing.
The yellow ring is the softest, the green ring is medium and the blue ring is the hardest. Soft low pimples on the surface provide gentle stimulation and good grip.
By pressing, turning and playing with the ring, the finger muscles are strengthened and the wrist is activated. The enclosed instructions list 5 different activities as examples and inspiration.