1. IMPROVE YOUR GRIP STRENGTH AND INJURY RECOVERY - NIYIKOW Adjustable Grip Strength Strengtheners are great for strengthening hands, forearms, wrists and fingers. It's simple and efficient, and helps to improve grip, injury recovery, stress relief, and strength. Perfect for anyone looking to develop and maintain strong and healthy hands. This is a great hand strength exercise for those with arthritis, tendonitis, carpal tunnel, and those recovering from tendon surgery.2. ADJUSTABLE RESISTANCE AND PORTABLE PERSONAL HOME GYM - With adjustable resistance, you can adjust it from 22 lbs (10 kg) to 132 lbs (60 kg) according to your needs. It can be done at home or in the office in just 5-10 minutes a day. Perfect for athletes, musicians, rock climbers, tennis players and more.3. HIGH QUALITY AND DURABLE - Our grip trainers are made of heavy duty plastic and reinforced metal alloy materials, unlike our competitors, they can be damaged or even made of low quality materials. Durable and safe, it will not damage your hands and fingers, giving you a great user experience.4. FITS ALL HAND SHAPE AND PORTABLE DESIGN - Whether you are female or male, child or adult, beginner or experienced, you can start grip training anytime, anywhere. Suitable for all age groups, suitable for all hand types. NIYIKOW Hand Grippers are made of lightweight high-quality materials, so you can easily put them in bags, pockets and carry them around.