This is an adjustable hand grip strengthener.It features an adjustable resistance knob that allows users to customize the tension between 5 kg and 60 kg (approximately 11 to 132 lbs).The trainer is designed for rehabilitation patients, athletes, and fitness enthusiasts to improve forearm, wrist, and finger strength.The device is constructed with a durable steel spring and features an ergonomic, non-slip handle for comfortable use.Its lightweight and portable design makes it suitable for workouts at home, in the gym, or while traveling