- Power in your hands for everyone: suitable for climbers, tennis players, athletes, golfers and musicians; improves the flexibility and strength of fingers and wrists. - Adjustable resistance: 10 to 60 kg (22 to 132 lbs) to match your training level; you can increase grip strength gradually and safely. - Comfortable and durable: ergonomic soft handle for a comfortable grip; suitable for small and large hands, young and old; can be used anywhere, anytime. - Comprehensive customer service: includes a professional instruction poster and learning videos; 24/7 customer support available. - Improve grip and restore strength: strengthens hand, forearm, wrist and finger muscles; simple and effective for increasing gripping strength, stress relief and endurance. - Portable home gym option: adjustable resistance from 10 kg to 60 kg; easy 5-10 minute sessions at home or in the office; ideal for athletes, musicians, climbers and tennis players. - High-quality materials for long durability: robust plastic and reinforced metal alloy construction; safer for hands and fingers; designed to provide an excellent user experience.