Increase your grip strength : The Grip Strength Enhancer is ergonomically designed to increase your hand grip, finger and forearm strength, making your hands stronger. It increases your endurance and makes lifting weights easier. QUALITY AND DURABLE DESIGN: The Hand Grip Strengthener has a smooth aluminium handle design and a durable spring to withstand long lasting sessions. The forearm strengthener's handle is covered in high quality durable foam to keep you pain free so you can focus on your workout without pain. Portable design: and non-slip grip: The handles of the hand trainer are covered with the highest quality foam to resist sweat and keep your hands free from excessive pain. You can carry the hand trainer in your pocket and take it with you wherever you go. You can use it in the office, at work, or even while watching TV. It is perfect for everyone from adults to children. Injury rehabilitation and recovery - Daily hand exercises using the Hand Grip can help with the recovery of hand and forearm injuries such as arthritis, carpal tunnel, tendonitis, rheumatoid arthritis, broken or fractured wrists and tendon surgery. Hand grippers have also been shown to relax your hands and relieve stress. Size: 13*9.5cm Your satisfaction - our priority: the grip strengthener provides strength for your hands and improves your stamina through excellent after-sales service. If you have any questions or concerns, please feel free to contact us and we will take care of them for you.