Product Grip Strength Device This is an enhanced grip strength. Regular use can exercise finger strength, strengthen grip strength, and exercise hand strength. This gripper is small and portable, making it ideal for use in the office, home and gym. Exercise Method Exercise Method When exercising, hold for a second after squeezing, then release. Do not release quickly, otherwise the exercise effect will not be achieved, and the muscles will be sore. Doing it every day will increase your grip strength and your forearm strength will gradually increase. Exercise every day, not hundreds of times at a time, resting for a few days before exercising. This doesnt work, it will strain the muscles. Novice exercises: 4 sets a day, 8-12 reps each, 60 seconds rest for each set, after practicing the left hand, then the right hand. Advanced exercises: 4 sets a day, 20-25 reps in each set, rest for 30 seconds in each set, and then practice the right hand after the left hand. Anti-slip handle design Anti-slip handle design Fingerprint handle design and stripe design, not easy to slip, increase non-slip comfort Strength adjustment Strength adjustment Turn the nut to adjust the strength, the resistance can be adjusted between 20 to 70 kg (44 to 154 lbs). Arc Adjustment Rotation Adjustment Handle Rotating the arc adjuster can adjust the opening arc of the handle, which is more convenient for your hand to grasp. Handle width adjustable from 1.8 to 3.3