Best and comfortable hand/finger strengthening training tool for gym workout/home workout. Rated resistance up to 15kg/33lbs, the compact design allows you to take this hand exerciser with you wherever you go. Great for throwing in your bag for hand exercises. Made of high quality rigid foam/plastic handle and metal spring for durability. Exercising for an hour a day will greatly improve the strength and speed of your hands, wrists, and forearms. Ergonomically designed with soft foam handles that fit all hand sizes, men and women, and provide maximum comfort and slip resistance. Squeeze and release your daily anxiety while working on your grip as it helps increase blood flow If you have any questions, concerns, or need further information, please feel free to contact us anytime. Our team is dedicated to providing you with support and answering any inquiries you may have. Your satisfaction is our ultimate goal. We look forward to offering you top-quality products and service! Thank you for your support