The FitRx Hand Therapy Kit is a great way to get easy, quick hand exercise and stress relief anywhere! Choose from three different stress therapy balls (soft, medium, and firm) to alleviate stress and joint pain, enhance grip strength, prevent stiffness, and increase blood circulation, all in one package! These compact, portable, and easy–to–use therapy balls come in white (15kg), red (25kg), and black (35kg), and each one features a textured surface that’s comfortable to grip.