1,The adjustable grip strength enhancer can continuously strengthen the strength of the hands, forearms, wrists and fingers. It also helps to enhance hand grip strength and increase endurance. It is very suitable for beginners or those recovering finger strength. 2,Grip strength trainer can be adjusted from 11 pounds (5 kilograms) to 350 pounds (160 kilograms) as needed. It can be completed at home or in the office, taking only 5 to 10 minutes a day.Hand strengthening devices is very suitable for athletes, musicians, rock climbers, tennis players, etc. 3,Hand exerciser and grip strength enhancer. Whether you are a beginner or an experienced person, you can start grip strength training anytime and anywhere. The grip strength enhancer is made of lightweight and high-quality materials and can be easily put into a bag or pocket for carrying around. 4,Hand gripper strengthener is made of heavy-duty plastic and carbon steel materials, durable and safe, without harming your hands and fingers.Grip strength trainer ergonomic grip provides you with an excellent user experience. 5,Manual gripper has a lifetime counting function and does not require batteries. Record your exercise count each time to help you better track your progress. Press Count and rotate to reset. Specification:13.4cm x 16cm or 5.27in x 6.29in Color:Black or Red Material:‎Carbon Steel Usage:strengthen the wrist, forearm and fingers Package:1 x Grip strength trainer Note: 1. Please note that the photo does not show actual size, please refer to Description for size details. 2. Please allow differences due to manual measurement, thanks. 3. Due to the difference between different monitors, the image may not reflect the actual color of the item. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.