[Strengthen Strength]: Squeezing the Adjustable Hand Grip Exerciser will work all of the muscles in your fingers,hands and forearm; [Adjustable]: Grip strengthener exerciser is suitable for all abilities as the resistance can easily be adjusted between 10-50kg - increase the resistance as your strength develops; [Portable]: Grip strength trainer is easy to clean and store, the lightweight design of the handgrip makes it ideal to pop into your bag for use whilst out and about. You can train your forearms, hands, wrists and fingers no matter where you are; [Safrty]: Effective tool for injury prevention,injury rehabilitation, improving sport performance, improving ability to perform everyday tasks and for stress relief; [Fit Anyone]: The simple and convenient of hand grip strengthener design makes it a perfect training accessory for everyone who want to exercise, like: teens,adults and even seniors who want to maintain their hand grip.