【Free Control & Easy to Adjust】Our grip strength trainers feature adjustable grip spacing and weights to meet the needs of a variety of users. You can adjust the hand grip pitch to suit your individual hand size, no longer limited to the fixed grip size of a standard grip machine. 【Scientific Force & Safe and Non-Slip】Compared to the traditional V grip, our ergonomic design of the hand gripper helps the user to apply the correct amount of force, reduces the pressure on the little finger and works each finger in a balanced way, working the muscle groups of the forearm, wrist and fingers more effectively. 【Double Spring Assisted & Accurate Counting】Our hand grip strengthener are designed with dual high-performance springs to provide a greater range of resistance and ensure product longevity and durability. 【Multi-Purpose & Meet Various Needs】In addition to being used for grip strength training, this gripster is also multi-functional. It is suitable for hand rehabilitation training and is an ideal rehabilitation exercise tool for patients recovering from arthritis, tendonitis, carpal tunnel, hand injuries and tendon surgeries, meeting a wide range of fitness needs for different users. It can be used as a window breaker when necessary. 【What You Get】One adjustable grip trainer.