Light Tension: 2.3kg This is the original spring-loaded hand and finger exerciser, designed to strengthen the hands, wrists, and forearms, with the ability to train each finger individually. Used by athletes worldwide, it is also recommended by strength trainers and professional coaches, and is popular among musicians and those seeking to maintain everyday strength. It is also used in rehabilitation programs by many specialized physical therapists in Europe and America. For all musicians, the hands are an important part of their instrument. The Grip Master is the perfect tool for training the hands and fingertips. Musicians spend a long time training the strength, movement, endurance, coordination, and dexterity of their fingers. The Grip Master helps to enhance and maintain these abilities. ・Beginners can develop their fingering skills several months faster compared to training with only their instrument. ・Ideal for warming up before a musician's performance. ・Pocket-sized and durable construction. You can practice anytime, anywhere, even without your instrument. There are no noticeable scratches or stains, but please judge the condition based on the images, and refrain from purchasing if you are unable to make a judgment. We have disinfected it with alcohol. PROHANDS MUSIC GRIP MASTER Grip Master GM-14000 Light Tension