Features:1. All-in-one hand exerciser specifically design for many musical instruments. Also can be used for finger strength exercise in daily life.2. Safely and conveniently build strength, endurance, and flexibility and coordination, provides a complete strength training solution for fingers, hands, wrists, and forearms.3. Soft design, comfortable pressing, will not hurt your fingers. Durable and long service time.4. Extremely portable design, you can carry it in your luggage, pocket, purse, handbag etc., strength your fingers at any time when you want.5. Suitable for finger strengthening for guitar, piano, trigger ringer training, arthritis therapy and rock climbing.Specification:Material: Plastic+ RubberOptional Color: Black, Light GreenTension Range: 4LB to 7LBSize: Approx.9*7*2cm/ 3.54*2.76*0.79inPacking List:1 * Finger Strengthener.Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.