1. Free control and easy adjustment: Our grip strength trainer must have adjustable grip distance and weight to meet the needs of different users. You can adjust the grip distance according to the size of your palm, rather than being limited to the fixed size of standard grip strength trainers, and choose a resistance of 5 - 165 kilograms according to the training intensity. Whether you want to enhance muscle strength or hand flexibility, this simulator can meet your goals. 2. Scientific and safe anti - slip force application: Compared with the traditional V - shaped grip, our ergonomic grip design helps users apply the necessary force, reduces the pressure on the little finger, exercises each finger evenly, and more effectively trains the muscle groups of the forearm, wrist, and fingers. The forearm strengthener must be equipped with anti - slip rubber to reduce the risk of slipping or falling, relieve hand fatigue, and improve comfort. 3. Double springs and accurate meter: The hand - fixing trainer is equipped with two high - efficiency springs to ensure greater resistance, durability, and strength of the product. In addition, the hand - fixing device must be equipped with a meter to record the number of repetitions of each training session. It is convenient to track progress and set goals. 4. Multi - purpose to meet various needs: In addition to strength training, this barbell has multiple functions. It is suitable for arm training and is an ideal rehabilitation tool for patients recovering from arthritis, tendonitis, carpal tunnel syndrome, hand injuries, and tendon surgery, meeting the various fitness needs of different users. If necessary, it can be used as a glass container.