[Ideal compatible sports enthusiasts] The finger strengthener can improve finger strength compatible athletes (rock climbing, fitness, tennis, baseball, boxing) and musicians (guitar, bass, pianist, violinist) as well as everyday chores (driving, typing, writing, working, etc.).6 Endurance Levels to ChooseThe silicone guitar finger exerciser provides you with 6 endurance levels, including 6.6LB, 8.8LB, 11LB, 13LB, 17LB and 21LB.You can choose the right level according to your grip strength.High quality materialOur finger stretchers are made of high quality silicone material, which is safe and durable, not easy to tear, and can be used compatible a long time.[Portable and lightweight design] The finger trainer is small and lightweight, you can put it in your gym bag or pocket. You can enjoy your workout at work or at leisure. You can exercise your hands anytime and anywhere with the finger extender trainer.Customer concept firstIf there is any problem with the product, please contact me in time.