Features: Material: Manufactured from spring steel, its stainless, durable, and flexible to use. Grip Strength Trainer: Improve the strength of your hands, fingers, wrist and forearms, perfect for those people who have arthritis,or who are musicians, athletes, golfers, rock climbers and tennis players. Convenient to Use: Available to train grip strength no matter where you are. Itssuitable for exercise, gym, home, workplace, or even on an airplane without bothering those around you. Adjustable Resistance: Easy to adjust by a screw cap from 11lbs/5kgs - 132lbs/60kgsto meet different strength need. More Details: Strong plastic, stainless spring, and ergonomic non-slip rubber details. Portable Compact: Small and compact enoughto fit it in pocket, handbag or gym bag. Inner Counter: It can record your movements of hand grip training to help you form a healthy habit everyday.