product description1.you can adjust it from 20 lbs to 90 lbs according to your need. Can be done at home or in office with just 5-10 minutes per day. Perfect for athletes, musicians, rock climbers, tennis players, etc.2.Grip Strength Training. it is recommended for primary trainers. male / female beginner.3.Hand gripper is made of lightweight and high-quality materials,Grip strength trainer. It's easy to carry when you go out, travel or travel.4.FITS HAND SIZES & PORTABLE DESIGN - No matter youre women or men, kids or adults, beginner or an experienced person, you can start grip training anytime and anywhere. Suitable for age groups and fits well for hand sizes.5.Relieve Pain, Improve Circulation Offering pre- and post-workout recovery these hand exerciser grip strengthener tools offer occupational therapy for carpal tunnel due to computer use, rheumatoid arthritis, joint pain and stiffness, or tendonitis.