PurAthletics Hand Therapy Ball - 2 pcs. set.Medium and Soft density balls offer resistance, strength training, and rehabilitation of hand muscles.  Ideal for users of computers, musicians, athletes or workers requiring hand strength and conditioning.  Light Small Design, allow you carry anywhere. You can sit on a chair, lay on the bed, on the floor or on a yoga mat to massage all areas of your body. Or Use at home, office or gym. Well made of high-quality Rubber, these ball massager are long lasting and smooth, offer you a very comfortable experience when you exercise to keep you healthy. Official size and weight makes it also great for lacrosse practice. 360 degree Spherical Design, easily helps us ease the stress and tensions by simply flexible rolling, enhance blood circulation and Recover vitality. Practical Training tool for your daily physical exercise.