The therapy screw is a supporting tool for a wide range of therapies for fingers, hands and forearms. The different colors make it easier to name the individual nuts. Their different shapes allow different levels of difficulty in the position of the fingers. The screw - unlike a threaded rod - offers the patient a better grip, increasing concentration on the hand to be moved. Screwing 2 or 3 nuts at the same time also poses a challenge for motor skills.