Hand Exercisers features: 100lbs 300lbs Hand Grip Strengthener Heavy Grip Trainer Arm Finger Rehabilitation Exercise Power Handgrip Hand Gripper Strengths| Hand Grips Features: Increase your grip increase your lifts Excellent for building forearm strength Works great for increasing speed, strength and power in the wrist, hands, fingers and forearms. Excellent recovery & rehabilitation tool for arthritis, carpel tunnel, rheumatoid arthritis, tendinitis, post surgery, tennis elbow, wrist sprains and broken fingers or wrists. Ergonomic & ambidextrous design makes it suitable for men women, seniors, teens and pre-teens, and children, depending on age. 1. For long-term Internet users, single-hand workers, young people, and elderly enthusiasts, it is recommended to use 100 pounds (100LB) for basic muscle recovery training. 2. For general gripper practitioners and ordinary young people with hand strength, it is recommended to use 150 pounds and 200 pounds for daily lifting training of arm strength and grasping power. 3. For professional grip practitioners, wrestlers, weightlifters, and strong players, it is recommended to use 250 or 300 pounds for impact training of arm grip. Fit for building wrist,forearm strength Fit for climbers, martial artists, athletes and anyone who wants to improve their hand strength By increasing the resistance, it will eventually allow you to build hand strength Specification: Material: Aluminum & Alloy Color: Silvery Size: 13.4cm*10.4cm*1.8cm Package included: 1 x Fitness Heavy Grips