Brand: D'Addario Product Size: 7cm long x 6cm wide Cleaned Hand training tool developed by musicians for musicians Can be used to train and maintain the strength, flexibility, and dexterity of the fingertips, hands, wrists, and forearms necessary for playing musical instruments. Adjustable tension for each finger, from extra light to medium. Reversible grip allows for individual finger or whole-hand grip training. Simulated parts allow for training to toughen the fingertips, preventing pain when playing guitar. Some use has occurred. Used item. No noticeable scratches or stains.