1Portable and Adjustable: Easily portable and adjustable telescopic tension ball for convenient arm strength training at home or on the go. 2Effective Workout: Provides effective arm strength training, helping to tone and strengthen your arm muscles for improved performance in sports and everyday activities. 3Durable Construction: Made with high grade SEBS materials, high toughness, ensuring durability and long lasting use for a reliable fitness tool. 4Easy to Use: Simply squeeze the tension ball for a challenging workout that targets your arm muscles, helping you achieve your fitness goals faster. 5Versatile Training Tool: Suitable for all fitness levels, from beginners to advanced, and can be used to target different muscle groups, including biceps, triceps, and forearms. 1 x Telescopic Tension Ball